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output/httpd: convert to C++

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This commit is contained in:
Max Kellermann 2013-01-15 18:22:17 +01:00
parent 5822daa63d
commit 7087935656
9 changed files with 914 additions and 991 deletions
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7
Makefile.am
View File

@ -101,8 +101,6 @@ mpd_headers = \
src/AudioCompress/compress.h \
src/path.h \
src/open.h \
src/output/httpd_client.h \
src/output/httpd_internal.h \
src/page.h \
src/Playlist.hxx \
src/playlist_error.h \
@ -899,8 +897,9 @@ endif
if ENABLE_HTTPD_OUTPUT
liboutput_plugins_a_SOURCES += \
src/icy_server.c \
src/output/httpd_client.c \
src/output/httpd_output_plugin.c src/output/httpd_output_plugin.h
src/output/HttpdInternal.hxx \
src/output/HttpdClient.cxx src/output/HttpdClient.hxx \
src/output/HttpdOutputPlugin.cxx src/output/HttpdOutputPlugin.hxx
endif
if ENABLE_SOLARIS_OUTPUT

2
src/OutputList.cxx
View File

@ -24,7 +24,7 @@
#include "output/ao_output_plugin.h"
#include "output/ffado_output_plugin.h"
#include "output/fifo_output_plugin.h"
#include "output/httpd_output_plugin.h"
#include "output/HttpdOutputPlugin.hxx"
#include "output/jack_output_plugin.h"
#include "output/mvp_output_plugin.h"
#include "output/null_output_plugin.h"

592
src/output/HttpdClient.cxx Normal file
View File

@ -0,0 +1,592 @@
/*
* Copyright (C) 2003-2011 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "HttpdClient.hxx"
#include "HttpdInternal.hxx"
#include "util/fifo_buffer.h"
#include "page.h"
#include "icy_server.h"
#include "glib_socket.h"
#include <assert.h>
#include <string.h>
#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "httpd_output"
HttpdClient::~HttpdClient()
{
if (state == RESPONSE) {
if (write_source_id != 0)
g_source_remove(write_source_id);
if (current_page != nullptr)
page_unref(current_page);
for (auto page : pages)
page_unref(page);
} else
fifo_buffer_free(input);
if (metadata)
page_unref(metadata);
g_source_remove(read_source_id);
g_io_channel_unref(channel);
}
void
HttpdClient::Close()
{
httpd_output_remove_client(httpd, this);
}
void
HttpdClient::LockClose()
{
const ScopeLock protect(httpd->mutex);
Close();
}
void
HttpdClient::BeginResponse()
{
assert(state != RESPONSE);
state = RESPONSE;
write_source_id = 0;
current_page = nullptr;
httpd_output_send_header(httpd, this);
}
/**
* Handle a line of the HTTP request.
*/
bool
HttpdClient::HandleLine(const char *line)
{
assert(state != RESPONSE);
if (state == REQUEST) {
if (strncmp(line, "GET /", 5) != 0) {
/* only GET is supported */
g_warning("malformed request line from client");
return false;
}
line = strchr(line + 5, ' ');
if (line == nullptr || strncmp(line + 1, "HTTP/", 5) != 0) {
/* HTTP/0.9 without request headers */
BeginResponse();
return true;
}
/* after the request line, request headers follow */
state = HEADERS;
return true;
} else {
if (*line == 0) {
/* empty line: request is finished */
BeginResponse();
return true;
}
if (g_ascii_strncasecmp(line, "Icy-MetaData: 1", 15) == 0) {
/* Send icy metadata */
metadata_requested = metadata_supported;
return true;
}
if (g_ascii_strncasecmp(line, "transferMode.dlna.org: Streaming", 32) == 0) {
/* Send as dlna */
dlna_streaming_requested = true;
/* metadata is not supported by dlna streaming, so disable it */
metadata_supported = false;
metadata_requested = false;
return true;
}
/* expect more request headers */
return true;
}
}
char *
HttpdClient::ReadLine()
{
assert(state != RESPONSE);
const ScopeLock protect(httpd->mutex);
size_t length;
const char *p = (const char *)fifo_buffer_read(input, &length);
if (p == nullptr)
/* empty input buffer */
return nullptr;
const char *newline = (const char *)memchr(p, '\n', length);
if (newline == nullptr)
/* incomplete line */
return nullptr;
char *line = g_strndup(p, newline - p);
fifo_buffer_consume(input, newline - p + 1);
/* remove trailing whitespace (e.g. '\r') */
return g_strchomp(line);
}
/**
* Sends the status line and response headers to the client.
*/
bool
HttpdClient::SendResponse()
{
char buffer[1024];
GError *error = nullptr;
GIOStatus status;
gsize bytes_written;
assert(state == RESPONSE);
if (dlna_streaming_requested) {
g_snprintf(buffer, sizeof(buffer),
"HTTP/1.1 206 OK\r\n"
"Content-Type: %s\r\n"
"Content-Length: 10000\r\n"
"Content-RangeX: 0-1000000/1000000\r\n"
"transferMode.dlna.org: Streaming\r\n"
"Accept-Ranges: bytes\r\n"
"Connection: close\r\n"
"realTimeInfo.dlna.org: DLNA.ORG_TLAG=*\r\n"
"contentFeatures.dlna.org: DLNA.ORG_OP=01;DLNA.ORG_CI=0\r\n"
"\r\n",
httpd->content_type);
} else if (metadata_requested) {
gchar *metadata_header;
metadata_header =
icy_server_metadata_header(httpd->name, httpd->genre,
httpd->website,
httpd->content_type,
metaint);
g_strlcpy(buffer, metadata_header, sizeof(buffer));
g_free(metadata_header);
} else { /* revert to a normal HTTP request */
g_snprintf(buffer, sizeof(buffer),
"HTTP/1.1 200 OK\r\n"
"Content-Type: %s\r\n"
"Connection: close\r\n"
"Pragma: no-cache\r\n"
"Cache-Control: no-cache, no-store\r\n"
"\r\n",
httpd->content_type);
}
status = g_io_channel_write_chars(channel,
buffer, strlen(buffer),
&bytes_written, &error);
switch (status) {
case G_IO_STATUS_NORMAL:
case G_IO_STATUS_AGAIN:
return true;
case G_IO_STATUS_EOF:
/* client has disconnected */
Close();
return false;
case G_IO_STATUS_ERROR:
/* I/O error */
g_warning("failed to write to client: %s", error->message);
g_error_free(error);
Close();
return false;
}
/* unreachable */
Close();
return false;
}
bool
HttpdClient::Received()
{
assert(state != RESPONSE);
char *line;
bool success;
while ((line = ReadLine()) != nullptr) {
success = HandleLine(line);
g_free(line);
if (!success) {
assert(state != RESPONSE);
return false;
}
if (state == RESPONSE) {
if (!fifo_buffer_is_empty(input)) {
g_warning("unexpected input from client");
return false;
}
fifo_buffer_free(input);
return SendResponse();
}
}
return true;
}
bool
HttpdClient::Read()
{
size_t max_length;
GError *error = nullptr;
GIOStatus status;
gsize bytes_read;
if (state == RESPONSE) {
/* the client has already sent the request, and he
must not send more */
char buffer[1];
status = g_io_channel_read_chars(channel, buffer,
sizeof(buffer), &bytes_read,
nullptr);
if (status == G_IO_STATUS_NORMAL)
g_warning("unexpected input from client");
return false;
}
char *p = (char *)fifo_buffer_write(input, &max_length);
if (p == nullptr) {
g_warning("buffer overflow");
return false;
}
status = g_io_channel_read_chars(channel, p, max_length,
&bytes_read, &error);
switch (status) {
case G_IO_STATUS_NORMAL:
fifo_buffer_append(input, bytes_read);
return Received();
case G_IO_STATUS_AGAIN:
/* try again later, after select() */
return true;
case G_IO_STATUS_EOF:
/* peer disconnected */
return false;
case G_IO_STATUS_ERROR:
/* I/O error */
g_warning("failed to read from client: %s",
error->message);
g_error_free(error);
return false;
}
/* unreachable */
return false;
}
static gboolean
httpd_client_in_event(G_GNUC_UNUSED GIOChannel *source, GIOCondition condition,
gpointer data)
{
HttpdClient *client = (HttpdClient *)data;
if (condition == G_IO_IN && client->Read()) {
return true;
} else {
client->LockClose();
return false;
}
}
HttpdClient::HttpdClient(httpd_output *_httpd, int _fd,
bool _metadata_supported)
:httpd(_httpd),
channel(g_io_channel_new_socket(_fd)),
input(fifo_buffer_new(4096)),
state(REQUEST),
dlna_streaming_requested(false),
metadata_supported(_metadata_supported),
metadata_requested(false), metadata_sent(true),
metaint(8192), /*TODO: just a std value */
metadata(nullptr),
metadata_current_position(0), metadata_fill(0)
{
/* GLib is responsible for closing the file descriptor */
g_io_channel_set_close_on_unref(channel, true);
/* NULL encoding means the stream is binary safe */
g_io_channel_set_encoding(channel, nullptr, nullptr);
/* we prefer to do buffering */
g_io_channel_set_buffered(channel, false);
read_source_id = g_io_add_watch(channel,
GIOCondition(G_IO_IN|G_IO_ERR|G_IO_HUP),
httpd_client_in_event, this);
}
size_t
HttpdClient::GetQueueSize() const
{
if (state != RESPONSE)
return 0;
size_t size = 0;
for (auto page : pages)
size += page->size;
return size;
}
void
HttpdClient::CancelQueue()
{
if (state != RESPONSE)
return;
for (auto page : pages)
page_unref(page);
pages.clear();
if (write_source_id != 0 && current_page == nullptr) {
g_source_remove(write_source_id);
write_source_id = 0;
}
}
static GIOStatus
write_page_to_channel(GIOChannel *channel,
const struct page *page, size_t position,
gsize *bytes_written_r, GError **error)
{
assert(channel != nullptr);
assert(page != nullptr);
assert(position < page->size);
return g_io_channel_write_chars(channel,
(const gchar*)page->data + position,
page->size - position,
bytes_written_r, error);
}
static GIOStatus
write_n_bytes_to_channel(GIOChannel *channel, const struct page *page,
size_t position, gint n,
gsize *bytes_written_r, GError **error)
{
GIOStatus status;
assert(channel != nullptr);
assert(page != nullptr);
assert(position < page->size);
if (n == -1) {
status = write_page_to_channel (channel, page, position,
bytes_written_r, error);
} else {
status = g_io_channel_write_chars(channel,
(const gchar*)page->data + position,
n, bytes_written_r, error);
}
return status;
}
int
HttpdClient::GetBytesTillMetaData() const
{
if (metadata_requested &&
current_page->size - current_position > metaint - metadata_fill)
return metaint - metadata_fill;
return -1;
}
inline bool
HttpdClient::Write()
{
GError *error = nullptr;
GIOStatus status;
gsize bytes_written;
const ScopeLock protect(httpd->mutex);
assert(state == RESPONSE);
if (write_source_id == 0)
/* another thread has removed the event source while
this thread was waiting for httpd->mutex */
return false;
if (current_page == nullptr) {
current_page = pages.front();
pages.pop_front();
current_position = 0;
}
const gint bytes_to_write = GetBytesTillMetaData();
if (bytes_to_write == 0) {
gint metadata_to_write;
metadata_to_write = metadata_current_position;
if (!metadata_sent) {
status = write_page_to_channel(channel,
metadata,
metadata_to_write,
&bytes_written, &error);
metadata_current_position += bytes_written;
if (metadata->size - metadata_current_position == 0) {
metadata_fill = 0;
metadata_current_position = 0;
metadata_sent = true;
}
} else {
struct page *empty_meta;
guchar empty_data = 0;
empty_meta = page_new_copy(&empty_data, 1);
status = write_page_to_channel(channel,
empty_meta,
metadata_to_write,
&bytes_written, &error);
metadata_current_position += bytes_written;
if (empty_meta->size - metadata_current_position == 0) {
metadata_fill = 0;
metadata_current_position = 0;
}
}
bytes_written = 0;
} else {
status = write_n_bytes_to_channel(channel, current_page,
current_position, bytes_to_write,
&bytes_written, &error);
}
switch (status) {
case G_IO_STATUS_NORMAL:
current_position += bytes_written;
assert(current_position <= current_page->size);
if (metadata_requested)
metadata_fill += bytes_written;
if (current_position >= current_page->size) {
page_unref(current_page);
current_page = nullptr;
if (pages.empty()) {
/* all pages are sent: remove the
event source */
write_source_id = 0;
return false;
}
}
return true;
case G_IO_STATUS_AGAIN:
return true;
case G_IO_STATUS_EOF:
/* client has disconnected */
Close();
return false;
case G_IO_STATUS_ERROR:
/* I/O error */
g_warning("failed to write to client: %s", error->message);
g_error_free(error);
Close();
return false;
}
/* unreachable */
Close();
return false;
}
static gboolean
httpd_client_out_event(gcc_unused GIOChannel *source,
gcc_unused GIOCondition condition, gpointer data)
{
assert(condition == G_IO_OUT);
HttpdClient *client = (HttpdClient *)data;
return client->Write();
}
void
HttpdClient::PushPage(struct page *page)
{
if (state != RESPONSE)
/* the client is still writing the HTTP request */
return;
page_ref(page);
pages.push_back(page);
if (write_source_id == 0)
write_source_id = g_io_add_watch(channel, G_IO_OUT,
httpd_client_out_event,
this);
}
void
HttpdClient::PushMetaData(struct page *page)
{
if (metadata) {
page_unref(metadata);
metadata = nullptr;
}
g_return_if_fail (page);
page_ref(page);
metadata = page;
metadata_sent = false;
}

215
src/output/HttpdClient.hxx Normal file
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@ -0,0 +1,215 @@
/*
* Copyright (C) 2003-2013 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_OUTPUT_HTTPD_CLIENT_HXX
#define MPD_OUTPUT_HTTPD_CLIENT_HXX
#include "gcc.h"
#include <glib.h>
#include <list>
#include <stddef.h>
struct httpd_output;
struct page;
class HttpdClient final {
/**
* The httpd output object this client is connected to.
*/
httpd_output *const httpd;
/**
* The TCP socket.
*/
GIOChannel *channel;
/**
* The GLib main loop source id for reading from the socket,
* and to detect errors.
*/
guint read_source_id;
/**
* The GLib main loop source id for writing to the socket. If
* 0, then there is no event source currently (because there
* are no queued pages).
*/
guint write_source_id;
/**
* For buffered reading. This pointer is only valid while the
* HTTP request is read.
*/
struct fifo_buffer *input;
/**
* The current state of the client.
*/
enum {
/** reading the request line */
REQUEST,
/** reading the request headers */
HEADERS,
/** sending the HTTP response */
RESPONSE,
} state;
/**
* A queue of #page objects to be sent to the client.
*/
std::list<page *> pages;
/**
* The #page which is currently being sent to the client.
*/
page *current_page;
/**
* The amount of bytes which were already sent from
* #current_page.
*/
size_t current_position;
/**
* If DLNA streaming was an option.
*/
bool dlna_streaming_requested;
/* ICY */
/**
* Do we support sending Icy-Metadata to the client? This is
* disabled if the httpd audio output uses encoder tags.
*/
bool metadata_supported;
/**
* If we should sent icy metadata.
*/
bool metadata_requested;
/**
* If the current metadata was already sent to the client.
*/
bool metadata_sent;
/**
* The amount of streaming data between each metadata block
*/
guint metaint;
/**
* The metadata as #page which is currently being sent to the client.
*/
page *metadata;
/*
* The amount of bytes which were already sent from the metadata.
*/
size_t metadata_current_position;
/**
* The amount of streaming data sent to the client
* since the last icy information was sent.
*/
guint metadata_fill;
public:
/**
* @param httpd the HTTP output device
* @param fd the socket file descriptor
*/
HttpdClient(httpd_output *httpd, int _fd, bool _metadata_supported);
/**
* Note: this does not remove the client from the
* #httpd_output object.
*/
~HttpdClient();
/**
* Frees the client and removes it from the server's client list.
*/
void Close();
void LockClose();
/**
* Returns the total size of this client's page queue.
*/
gcc_pure
size_t GetQueueSize() const;
/**
* Clears the page queue.
*/
void CancelQueue();
bool Read();
/**
* Data has been received from the client and it is appended
* to the input buffer.
*/
bool Received();
/**
* Check if a complete line of input is present in the input
* buffer, and duplicates it. It is removed from the input
* buffer. The return value has to be freed with g_free().
*/
char *ReadLine();
/**
* Handle a line of the HTTP request.
*/
bool HandleLine(const char *line);
/**
* Switch the client to the "RESPONSE" state.
*/
void BeginResponse();
/**
* Sends the status line and response headers to the client.
*/
bool SendResponse();
gcc_pure
int GetBytesTillMetaData() const;
bool Write();
/**
* Appends a page to the client's queue.
*/
void PushPage(page *page);
/**
* Sends the passed metadata.
*/
void PushMetaData(page *page);
};
#endif

14
src/output/httpd_internal.h → src/output/HttpdInternal.hxx
View File

@ -25,14 +25,18 @@
#ifndef MPD_OUTPUT_HTTPD_INTERNAL_H
#define MPD_OUTPUT_HTTPD_INTERNAL_H
#include "HttpdClient.hxx"
#include "output_internal.h"
#include "timer.h"
#include "thread/Mutex.hxx"
#include <glib.h>
#include <forward_list>
#include <stdbool.h>
struct httpd_client;
class HttpdClient;
struct httpd_output {
struct audio_output base;
@ -65,7 +69,7 @@ struct httpd_output {
* This mutex protects the listener socket and the client
* list.
*/
GMutex *mutex;
mutable Mutex mutex;
/**
* A #timer object to synchronize this output with the
@ -105,7 +109,7 @@ struct httpd_output {
* A linked list containing all clients which are currently
* connected.
*/
GList *clients;
std::forward_list<HttpdClient> clients;
/**
* A temporary buffer for the httpd_output_read_page()
@ -125,7 +129,7 @@ struct httpd_output {
*/
void
httpd_output_remove_client(struct httpd_output *httpd,
struct httpd_client *client);
HttpdClient *client);
/**
* Sends the encoder header to the client. This is called right after
@ -133,6 +137,6 @@ httpd_output_remove_client(struct httpd_output *httpd,
*/
void
httpd_output_send_header(struct httpd_output *httpd,
struct httpd_client *client);
HttpdClient *client);
#endif

235
src/output/httpd_output_plugin.c → src/output/HttpdOutputPlugin.cxx
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2003-2011 The Music Player Daemon Project
* Copyright (C) 2003-2013 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
@ -18,9 +18,9 @@
*/
#include "config.h"
#include "httpd_output_plugin.h"
#include "httpd_internal.h"
#include "httpd_client.h"
#include "HttpdOutputPlugin.hxx"
#include "HttpdInternal.hxx"
#include "HttpdClient.hxx"
#include "output_api.h"
#include "encoder_plugin.h"
#include "encoder_list.h"
@ -60,9 +60,9 @@ httpd_output_quark(void)
*/
G_GNUC_PURE
static bool
httpd_output_has_clients(const struct httpd_output *httpd)
httpd_output_has_clients(const httpd_output *httpd)
{
return httpd->clients != NULL;
return !httpd->clients.empty();
}
/**
@ -70,12 +70,10 @@ httpd_output_has_clients(const struct httpd_output *httpd)
*/
G_GNUC_PURE
static bool
httpd_output_lock_has_clients(const struct httpd_output *httpd)
httpd_output_lock_has_clients(const httpd_output *httpd)
{
g_mutex_lock(httpd->mutex);
bool result = httpd_output_has_clients(httpd);
g_mutex_unlock(httpd->mutex);
return result;
const ScopeLock protect(httpd->mutex);
return httpd_output_has_clients(httpd);
}
static void
@ -83,32 +81,28 @@ httpd_listen_in_event(int fd, const struct sockaddr *address,
size_t address_length, int uid, void *ctx);
static bool
httpd_output_bind(struct httpd_output *httpd, GError **error_r)
httpd_output_bind(httpd_output *httpd, GError **error_r)
{
httpd->open = false;
g_mutex_lock(httpd->mutex);
bool success = server_socket_open(httpd->server_socket, error_r);
g_mutex_unlock(httpd->mutex);
return success;
const ScopeLock protect(httpd->mutex);
return server_socket_open(httpd->server_socket, error_r);
}
static void
httpd_output_unbind(struct httpd_output *httpd)
httpd_output_unbind(httpd_output *httpd)
{
assert(!httpd->open);
g_mutex_lock(httpd->mutex);
const ScopeLock protect(httpd->mutex);
server_socket_close(httpd->server_socket);
g_mutex_unlock(httpd->mutex);
}
static struct audio_output *
httpd_output_init(const struct config_param *param,
GError **error)
{
struct httpd_output *httpd = g_new(struct httpd_output, 1);
httpd_output *httpd = new httpd_output();
if (!ao_base_init(&httpd->base, &httpd_output_plugin, param, error)) {
g_free(httpd);
return NULL;
@ -174,50 +168,44 @@ httpd_output_init(const struct config_param *param,
httpd->content_type = "application/octet-stream";
}
httpd->mutex = g_mutex_new();
return &httpd->base;
}
static void
httpd_output_finish(struct audio_output *ao)
{
struct httpd_output *httpd = (struct httpd_output *)ao;
httpd_output *httpd = (httpd_output *)ao;
if (httpd->metadata)
page_unref(httpd->metadata);
encoder_finish(httpd->encoder);
server_socket_free(httpd->server_socket);
g_mutex_free(httpd->mutex);
ao_base_finish(&httpd->base);
g_free(httpd);
delete httpd;
}
/**
* Creates a new #httpd_client object and adds it into the
* Creates a new #HttpdClient object and adds it into the
* httpd_output.clients linked list.
*/
static void
httpd_client_add(struct httpd_output *httpd, int fd)
httpd_client_add(httpd_output *httpd, int fd)
{
struct httpd_client *client =
httpd_client_new(httpd, fd,
httpd->encoder->plugin->tag == NULL);
httpd->clients = g_list_prepend(httpd->clients, client);
httpd->clients.emplace_front(httpd, fd,
httpd->encoder->plugin->tag == NULL);
httpd->clients_cnt++;
/* pass metadata to client */
if (httpd->metadata)
httpd_client_send_metadata(client, httpd->metadata);
httpd->clients.front().PushMetaData(httpd->metadata);
}
static void
httpd_listen_in_event(int fd, const struct sockaddr *address,
size_t address_length, G_GNUC_UNUSED int uid, void *ctx)
{
struct httpd_output *httpd = ctx;
httpd_output *httpd = (httpd_output *)ctx;
/* the listener socket has become readable - a client has
connected */
@ -238,7 +226,6 @@ httpd_listen_in_event(int fd, const struct sockaddr *address,
progname, hostaddr);
g_free(hostaddr);
close_socket(fd);
g_mutex_unlock(httpd->mutex);
return;
}
@ -249,7 +236,7 @@ httpd_listen_in_event(int fd, const struct sockaddr *address,
(void)address_length;
#endif /* HAVE_WRAP */
g_mutex_lock(httpd->mutex);
const ScopeLock protect(httpd->mutex);
if (fd >= 0) {
/* can we allow additional client */
@ -262,8 +249,6 @@ httpd_listen_in_event(int fd, const struct sockaddr *address,
} else if (fd < 0 && errno != EINTR) {
g_warning("accept() failed: %s", g_strerror(errno));
}
g_mutex_unlock(httpd->mutex);
}
/**
@ -271,7 +256,7 @@ httpd_listen_in_event(int fd, const struct sockaddr *address,
* as a new #page object.
*/
static struct page *
httpd_output_read_page(struct httpd_output *httpd)
httpd_output_read_page(httpd_output *httpd)
{
if (httpd->unflushed_input >= 65536) {
/* we have fed a lot of input into the encoder, but it
@ -301,7 +286,7 @@ httpd_output_read_page(struct httpd_output *httpd)
}
static bool
httpd_output_encoder_open(struct httpd_output *httpd,
httpd_output_encoder_open(httpd_output *httpd,
struct audio_format *audio_format,
GError **error)
{
@ -321,7 +306,7 @@ httpd_output_encoder_open(struct httpd_output *httpd,
static bool
httpd_output_enable(struct audio_output *ao, GError **error_r)
{
struct httpd_output *httpd = (struct httpd_output *)ao;
httpd_output *httpd = (httpd_output *)ao;
return httpd_output_bind(httpd, error_r);
}
@ -329,7 +314,7 @@ httpd_output_enable(struct audio_output *ao, GError **error_r)
static void
httpd_output_disable(struct audio_output *ao)
{
struct httpd_output *httpd = (struct httpd_output *)ao;
httpd_output *httpd = (httpd_output *)ao;
httpd_output_unbind(httpd);
}
@ -338,82 +323,75 @@ static bool
httpd_output_open(struct audio_output *ao, struct audio_format *audio_format,
GError **error)
{
struct httpd_output *httpd = (struct httpd_output *)ao;
httpd_output *httpd = (httpd_output *)ao;
g_mutex_lock(httpd->mutex);
assert(httpd->clients.empty());
const ScopeLock protect(httpd->mutex);
/* open the encoder */
if (!httpd_output_encoder_open(httpd, audio_format, error)) {
g_mutex_unlock(httpd->mutex);
if (!httpd_output_encoder_open(httpd, audio_format, error))
return false;
}
/* initialize other attributes */
httpd->clients = NULL;
httpd->clients_cnt = 0;
httpd->timer = timer_new(audio_format);
httpd->open = true;
g_mutex_unlock(httpd->mutex);
return true;
}
static void
httpd_client_delete(gpointer data, G_GNUC_UNUSED gpointer user_data)
{
struct httpd_client *client = data;
httpd_client_free(client);
}
static void
httpd_output_close(struct audio_output *ao)
{
struct httpd_output *httpd = (struct httpd_output *)ao;
httpd_output *httpd = (httpd_output *)ao;
g_mutex_lock(httpd->mutex);
const ScopeLock protect(httpd->mutex);
httpd->open = false;
timer_free(httpd->timer);
g_list_foreach(httpd->clients, httpd_client_delete, NULL);
g_list_free(httpd->clients);
httpd->clients.clear();
if (httpd->header != NULL)
page_unref(httpd->header);
encoder_close(httpd->encoder);
g_mutex_unlock(httpd->mutex);
}
void
httpd_output_remove_client(struct httpd_output *httpd,
struct httpd_client *client)
httpd_output_remove_client(httpd_output *httpd, HttpdClient *client)
{
assert(httpd != NULL);
assert(httpd->clients_cnt > 0);
assert(client != NULL);
httpd->clients = g_list_remove(httpd->clients, client);
httpd->clients_cnt--;
for (auto prev = httpd->clients.before_begin(), i = std::next(prev);;
prev = i, i = std::next(prev)) {
assert(i != httpd->clients.end());
if (&*i == client) {
httpd->clients.erase_after(prev);
httpd->clients_cnt--;
break;
}
}
}
void
httpd_output_send_header(struct httpd_output *httpd,
struct httpd_client *client)
httpd_output_send_header(httpd_output *httpd, HttpdClient *client)
{
if (httpd->header != NULL)
httpd_client_send(client, httpd->header);
client->PushPage(httpd->header);
}
static unsigned
httpd_output_delay(struct audio_output *ao)
{
struct httpd_output *httpd = (struct httpd_output *)ao;
httpd_output *httpd = (httpd_output *)ao;
if (!httpd_output_lock_has_clients(httpd) && httpd->base.pause) {
/* if there's no client and this output is paused,
@ -433,51 +411,35 @@ httpd_output_delay(struct audio_output *ao)
: 0;
}
static void
httpd_client_check_queue(gpointer data, G_GNUC_UNUSED gpointer user_data)
{
struct httpd_client *client = data;
if (httpd_client_queue_size(client) > 256 * 1024) {
g_debug("client is too slow, flushing its queue");
httpd_client_cancel(client);
}
}
static void
httpd_client_send_page(gpointer data, gpointer user_data)
{
struct httpd_client *client = data;
struct page *page = user_data;
httpd_client_send(client, page);
}
/**
* Broadcasts a page struct to all clients.
*/
static void
httpd_output_broadcast_page(struct httpd_output *httpd, struct page *page)
httpd_output_broadcast_page(httpd_output *httpd, struct page *page)
{
assert(page != NULL);
g_mutex_lock(httpd->mutex);
g_list_foreach(httpd->clients, httpd_client_send_page, page);
g_mutex_unlock(httpd->mutex);
const ScopeLock protect(httpd->mutex);
for (auto &client : httpd->clients)
client.PushPage(page);
}
/**
* Broadcasts data from the encoder to all clients.
*/
static void
httpd_output_encoder_to_clients(struct httpd_output *httpd)
httpd_output_encoder_to_clients(httpd_output *httpd)
{
httpd->mutex.lock();
for (auto &client : httpd->clients) {
if (client.GetQueueSize() > 256 * 1024) {
g_debug("client is too slow, flushing its queue");
client.CancelQueue();
}
}
httpd->mutex.unlock();
struct page *page;
g_mutex_lock(httpd->mutex);
g_list_foreach(httpd->clients, httpd_client_check_queue, NULL);
g_mutex_unlock(httpd->mutex);
while ((page = httpd_output_read_page(httpd)) != NULL) {
httpd_output_broadcast_page(httpd, page);
page_unref(page);
@ -485,7 +447,7 @@ httpd_output_encoder_to_clients(struct httpd_output *httpd)
}
static bool
httpd_output_encode_and_play(struct httpd_output *httpd,
httpd_output_encode_and_play(httpd_output *httpd,
const void *chunk, size_t size, GError **error)
{
if (!encoder_write(httpd->encoder, chunk, size, error))
@ -502,7 +464,7 @@ static size_t
httpd_output_play(struct audio_output *ao, const void *chunk, size_t size,
GError **error_r)
{
struct httpd_output *httpd = (struct httpd_output *)ao;
httpd_output *httpd = (httpd_output *)ao;
if (httpd_output_lock_has_clients(httpd)) {
if (!httpd_output_encode_and_play(httpd, chunk, size, error_r))
@ -519,10 +481,10 @@ httpd_output_play(struct audio_output *ao, const void *chunk, size_t size,
static bool
httpd_output_pause(struct audio_output *ao)
{
struct httpd_output *httpd = (struct httpd_output *)ao;
httpd_output *httpd = (httpd_output *)ao;
if (httpd_output_lock_has_clients(httpd)) {
static const char silence[1020];
static const char silence[1020] = { 0 };
return httpd_output_play(ao, silence, sizeof(silence),
NULL) > 0;
} else {
@ -530,19 +492,10 @@ httpd_output_pause(struct audio_output *ao)
}
}
static void
httpd_send_metadata(gpointer data, gpointer user_data)
{
struct httpd_client *client = data;
struct page *icy_metadata = user_data;
httpd_client_send_metadata(client, icy_metadata);
}
static void
httpd_output_tag(struct audio_output *ao, const struct tag *tag)
{
struct httpd_output *httpd = (struct httpd_output *)ao;
httpd_output *httpd = (httpd_output *)ao;
assert(tag != NULL);
@ -581,43 +534,37 @@ httpd_output_tag(struct audio_output *ao, const struct tag *tag)
TAG_ARTIST, TAG_TITLE,
TAG_NUM_OF_ITEM_TYPES);
if (httpd->metadata != NULL) {
g_mutex_lock(httpd->mutex);
g_list_foreach(httpd->clients,
httpd_send_metadata, httpd->metadata);
g_mutex_unlock(httpd->mutex);
const ScopeLock protect(httpd->mutex);
for (auto &client : httpd->clients)
client.PushMetaData(httpd->metadata);
}
}
}
static void
httpd_client_cancel_callback(gpointer data, G_GNUC_UNUSED gpointer user_data)
{
struct httpd_client *client = data;
httpd_client_cancel(client);
}
static void
httpd_output_cancel(struct audio_output *ao)
{
struct httpd_output *httpd = (struct httpd_output *)ao;
httpd_output *httpd = (httpd_output *)ao;
g_mutex_lock(httpd->mutex);
g_list_foreach(httpd->clients, httpd_client_cancel_callback, NULL);
g_mutex_unlock(httpd->mutex);
const ScopeLock protect(httpd->mutex);
for (auto &client : httpd->clients)
client.CancelQueue();
}
const struct audio_output_plugin httpd_output_plugin = {
.name = "httpd",
.init = httpd_output_init,
.finish = httpd_output_finish,
.enable = httpd_output_enable,
.disable = httpd_output_disable,
.open = httpd_output_open,
.close = httpd_output_close,
.delay = httpd_output_delay,
.send_tag = httpd_output_tag,
.play = httpd_output_play,
.pause = httpd_output_pause,
.cancel = httpd_output_cancel,
"httpd",
nullptr,
httpd_output_init,
httpd_output_finish,
httpd_output_enable,
httpd_output_disable,
httpd_output_open,
httpd_output_close,
httpd_output_delay,
httpd_output_tag,
httpd_output_play,
nullptr,
httpd_output_cancel,
httpd_output_pause,
nullptr,
};

6
src/output/httpd_output_plugin.h → src/output/HttpdOutputPlugin.hxx
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2003-2011 The Music Player Daemon Project
* Copyright (C) 2003-2013 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
@ -17,8 +17,8 @@
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_HTTPD_OUTPUT_PLUGIN_H
#define MPD_HTTPD_OUTPUT_PLUGIN_H
#ifndef MPD_HTTPD_OUTPUT_PLUGIN_HXX
#define MPD_HTTPD_OUTPUT_PLUGIN_HXX
extern const struct audio_output_plugin httpd_output_plugin;

764
src/output/httpd_client.c
View File

@ -1,764 +0,0 @@
/*
* Copyright (C) 2003-2011 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "httpd_client.h"
#include "httpd_internal.h"
#include "util/fifo_buffer.h"
#include "page.h"
#include "icy_server.h"
#include "glib_socket.h"
#include <stdbool.h>
#include <assert.h>
#include <string.h>
#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "httpd_output"
struct httpd_client {
/**
* The httpd output object this client is connected to.
*/
struct httpd_output *httpd;
/**
* The TCP socket.
*/
GIOChannel *channel;
/**
* The GLib main loop source id for reading from the socket,
* and to detect errors.
*/
guint read_source_id;
/**
* The GLib main loop source id for writing to the socket. If
* 0, then there is no event source currently (because there
* are no queued pages).
*/
guint write_source_id;
/**
* For buffered reading. This pointer is only valid while the
* HTTP request is read.
*/
struct fifo_buffer *input;
/**
* The current state of the client.
*/
enum {
/** reading the request line */
REQUEST,
/** reading the request headers */
HEADERS,
/** sending the HTTP response */
RESPONSE,
} state;
/**
* A queue of #page objects to be sent to the client.
*/
GQueue *pages;
/**
* The #page which is currently being sent to the client.
*/
struct page *current_page;
/**
* The amount of bytes which were already sent from
* #current_page.
*/
size_t current_position;
/**
* If DLNA streaming was an option.
*/
bool dlna_streaming_requested;
/* ICY */
/**
* Do we support sending Icy-Metadata to the client? This is
* disabled if the httpd audio output uses encoder tags.
*/
bool metadata_supported;
/**
* If we should sent icy metadata.
*/
bool metadata_requested;
/**
* If the current metadata was already sent to the client.
*/
bool metadata_sent;
/**
* The amount of streaming data between each metadata block
*/
guint metaint;
/**
* The metadata as #page which is currently being sent to the client.
*/
struct page *metadata;
/*
* The amount of bytes which were already sent from the metadata.
*/
size_t metadata_current_position;
/**
* The amount of streaming data sent to the client
* since the last icy information was sent.
*/
guint metadata_fill;
};
static void
httpd_client_unref_page(gpointer data, G_GNUC_UNUSED gpointer user_data)
{
struct page *page = data;
page_unref(page);
}
void
httpd_client_free(struct httpd_client *client)
{
assert(client != NULL);
if (client->state == RESPONSE) {
if (client->write_source_id != 0)
g_source_remove(client->write_source_id);
if (client->current_page != NULL)
page_unref(client->current_page);
g_queue_foreach(client->pages, httpd_client_unref_page, NULL);
g_queue_free(client->pages);
} else
fifo_buffer_free(client->input);
if (client->metadata)
page_unref (client->metadata);
g_source_remove(client->read_source_id);
g_io_channel_unref(client->channel);
g_free(client);
}
/**
* Frees the client and removes it from the server's client list.
*/
static void
httpd_client_close(struct httpd_client *client)
{
assert(client != NULL);
httpd_output_remove_client(client->httpd, client);
httpd_client_free(client);
}
/**
* Switch the client to the "RESPONSE" state.
*/
static void
httpd_client_begin_response(struct httpd_client *client)
{
assert(client != NULL);
assert(client->state != RESPONSE);
client->state = RESPONSE;
client->write_source_id = 0;
client->pages = g_queue_new();
client->current_page = NULL;
httpd_output_send_header(client->httpd, client);
}
/**
* Handle a line of the HTTP request.
*/
static bool
httpd_client_handle_line(struct httpd_client *client, const char *line)
{
assert(client->state != RESPONSE);
if (client->state == REQUEST) {
if (strncmp(line, "GET /", 5) != 0) {
/* only GET is supported */
g_warning("malformed request line from client");
return false;
}
line = strchr(line + 5, ' ');
if (line == NULL || strncmp(line + 1, "HTTP/", 5) != 0) {
/* HTTP/0.9 without request headers */
httpd_client_begin_response(client);
return true;
}
/* after the request line, request headers follow */
client->state = HEADERS;
return true;
} else {
if (*line == 0) {
/* empty line: request is finished */
httpd_client_begin_response(client);
return true;
}
if (g_ascii_strncasecmp(line, "Icy-MetaData: 1", 15) == 0) {
/* Send icy metadata */
client->metadata_requested =
client->metadata_supported;
return true;
}
if (g_ascii_strncasecmp(line, "transferMode.dlna.org: Streaming", 32) == 0) {
/* Send as dlna */
client->dlna_streaming_requested = true;
/* metadata is not supported by dlna streaming, so disable it */
client->metadata_supported = false;
client->metadata_requested = false;
return true;
}
/* expect more request headers */
return true;
}
}
/**
* Check if a complete line of input is present in the input buffer,
* and duplicates it. It is removed from the input buffer. The
* return value has to be freed with g_free().
*/
static char *
httpd_client_read_line(struct httpd_client *client)
{
assert(client != NULL);
assert(client->state != RESPONSE);
const char *p, *newline;
size_t length;
char *line;
p = fifo_buffer_read(client->input, &length);
if (p == NULL)
/* empty input buffer */
return NULL;
newline = memchr(p, '\n', length);
if (newline == NULL)
/* incomplete line */
return NULL;
line = g_strndup(p, newline - p);
fifo_buffer_consume(client->input, newline - p + 1);
/* remove trailing whitespace (e.g. '\r') */
return g_strchomp(line);
}
/**
* Sends the status line and response headers to the client.
*/
static bool
httpd_client_send_response(struct httpd_client *client)
{
char buffer[1024];
GError *error = NULL;
GIOStatus status;
gsize bytes_written;
assert(client != NULL);
assert(client->state == RESPONSE);
if (client->dlna_streaming_requested) {
g_snprintf(buffer, sizeof(buffer),
"HTTP/1.1 206 OK\r\n"
"Content-Type: %s\r\n"
"Content-Length: 10000\r\n"
"Content-RangeX: 0-1000000/1000000\r\n"
"transferMode.dlna.org: Streaming\r\n"
"Accept-Ranges: bytes\r\n"
"Connection: close\r\n"
"realTimeInfo.dlna.org: DLNA.ORG_TLAG=*\r\n"
"contentFeatures.dlna.org: DLNA.ORG_OP=01;DLNA.ORG_CI=0\r\n"
"\r\n",
client->httpd->content_type);
} else if (client->metadata_requested) {
gchar *metadata_header;
metadata_header = icy_server_metadata_header(
client->httpd->name,
client->httpd->genre,
client->httpd->website,
client->httpd->content_type,
client->metaint);
g_strlcpy(buffer, metadata_header, sizeof(buffer));
g_free(metadata_header);
} else { /* revert to a normal HTTP request */
g_snprintf(buffer, sizeof(buffer),
"HTTP/1.1 200 OK\r\n"
"Content-Type: %s\r\n"
"Connection: close\r\n"
"Pragma: no-cache\r\n"
"Cache-Control: no-cache, no-store\r\n"
"\r\n",
client->httpd->content_type);
}
status = g_io_channel_write_chars(client->channel,
buffer, strlen(buffer),
&bytes_written, &error);
switch (status) {
case G_IO_STATUS_NORMAL:
case G_IO_STATUS_AGAIN:
return true;
case G_IO_STATUS_EOF:
/* client has disconnected */
httpd_client_close(client);
return false;
case G_IO_STATUS_ERROR:
/* I/O error */
g_warning("failed to write to client: %s", error->message);
g_error_free(error);
httpd_client_close(client);
return false;
}
/* unreachable */
httpd_client_close(client);
return false;
}
/**
* Data has been received from the client and it is appended to the
* input buffer.
*/
static bool
httpd_client_received(struct httpd_client *client)
{
assert(client != NULL);
assert(client->state != RESPONSE);
char *line;
bool success;
while ((line = httpd_client_read_line(client)) != NULL) {
success = httpd_client_handle_line(client, line);
g_free(line);
if (!success) {
assert(client->state != RESPONSE);
return false;
}
if (client->state == RESPONSE) {
if (!fifo_buffer_is_empty(client->input)) {
g_warning("unexpected input from client");
return false;
}
fifo_buffer_free(client->input);
return httpd_client_send_response(client);
}
}
return true;
}
static bool
httpd_client_read(struct httpd_client *client)
{
char *p;
size_t max_length;
GError *error = NULL;
GIOStatus status;
gsize bytes_read;
if (client->state == RESPONSE) {
/* the client has already sent the request, and he
must not send more */
char buffer[1];
status = g_io_channel_read_chars(client->channel, buffer,
sizeof(buffer), &bytes_read,
NULL);
if (status == G_IO_STATUS_NORMAL)
g_warning("unexpected input from client");
return false;
}
p = fifo_buffer_write(client->input, &max_length);
if (p == NULL) {
g_warning("buffer overflow");
return false;
}
status = g_io_channel_read_chars(client->channel, p, max_length,
&bytes_read, &error);
switch (status) {
case G_IO_STATUS_NORMAL:
fifo_buffer_append(client->input, bytes_read);
return httpd_client_received(client);
case G_IO_STATUS_AGAIN:
/* try again later, after select() */
return true;
case G_IO_STATUS_EOF:
/* peer disconnected */
return false;
case G_IO_STATUS_ERROR:
/* I/O error */
g_warning("failed to read from client: %s",
error->message);
g_error_free(error);
return false;
}
/* unreachable */
return false;
}
static gboolean
httpd_client_in_event(G_GNUC_UNUSED GIOChannel *source, GIOCondition condition,
gpointer data)
{
struct httpd_client *client = data;
struct httpd_output *httpd = client->httpd;
bool ret;
g_mutex_lock(httpd->mutex);
if (condition == G_IO_IN && httpd_client_read(client)) {
ret = true;
} else {
httpd_client_close(client);
ret = false;
}
g_mutex_unlock(httpd->mutex);
return ret;
}
struct httpd_client *
httpd_client_new(struct httpd_output *httpd, int fd, bool metadata_supported)
{
struct httpd_client *client = g_new(struct httpd_client, 1);
client->httpd = httpd;
client->channel = g_io_channel_new_socket(fd);
/* GLib is responsible for closing the file descriptor */
g_io_channel_set_close_on_unref(client->channel, true);
/* NULL encoding means the stream is binary safe */
g_io_channel_set_encoding(client->channel, NULL, NULL);
/* we prefer to do buffering */
g_io_channel_set_buffered(client->channel, false);
client->read_source_id = g_io_add_watch(client->channel,
G_IO_IN|G_IO_ERR|G_IO_HUP,
httpd_client_in_event, client);
client->input = fifo_buffer_new(4096);
client->state = REQUEST;
client->dlna_streaming_requested = false;
client->metadata_supported = metadata_supported;
client->metadata_requested = false;
client->metadata_sent = true;
client->metaint = 8192; /*TODO: just a std value */
client->metadata = NULL;
client->metadata_current_position = 0;
client->metadata_fill = 0;
return client;
}
static void
httpd_client_add_page_size(gpointer data, gpointer user_data)
{
struct page *page = data;
size_t *size = user_data;
*size += page->size;
}
size_t
httpd_client_queue_size(const struct httpd_client *client)
{
size_t size = 0;
if (client->state != RESPONSE)
return 0;
g_queue_foreach(client->pages, httpd_client_add_page_size, &size);
return size;
}
void
httpd_client_cancel(struct httpd_client *client)
{
if (client->state != RESPONSE)
return;
g_queue_foreach(client->pages, httpd_client_unref_page, NULL);
g_queue_clear(client->pages);
if (client->write_source_id != 0 && client->current_page == NULL) {
g_source_remove(client->write_source_id);
client->write_source_id = 0;
}
}
static GIOStatus
write_page_to_channel(GIOChannel *channel,
const struct page *page, size_t position,
gsize *bytes_written_r, GError **error)
{
assert(channel != NULL);
assert(page != NULL);
assert(position < page->size);
return g_io_channel_write_chars(channel,
(const gchar*)page->data + position,
page->size - position,
bytes_written_r, error);
}
static GIOStatus
write_n_bytes_to_channel(GIOChannel *channel, const struct page *page,
size_t position, gint n,
gsize *bytes_written_r, GError **error)
{
GIOStatus status;
assert(channel != NULL);
assert(page != NULL);
assert(position < page->size);
if (n == -1) {
status = write_page_to_channel (channel, page, position,
bytes_written_r, error);
} else {
status = g_io_channel_write_chars(channel,
(const gchar*)page->data + position,
n, bytes_written_r, error);
}
return status;
}
static gint
bytes_left_till_metadata (struct httpd_client *client)
{
assert(client != NULL);
if (client->metadata_requested &&
client->current_page->size - client->current_position
> client->metaint - client->metadata_fill)
return client->metaint - client->metadata_fill;
return -1;
}
static gboolean
httpd_client_out_event(GIOChannel *source,
G_GNUC_UNUSED GIOCondition condition, gpointer data)
{
struct httpd_client *client = data;
struct httpd_output *httpd = client->httpd;
GError *error = NULL;
GIOStatus status;
gsize bytes_written;
gint bytes_to_write;
g_mutex_lock(httpd->mutex);
assert(condition == G_IO_OUT);
assert(client->state == RESPONSE);
if (client->write_source_id == 0) {
/* another thread has removed the event source while
this thread was waiting for httpd->mutex */
g_mutex_unlock(httpd->mutex);
return false;
}
if (client->current_page == NULL) {
client->current_page = g_queue_pop_head(client->pages);
client->current_position = 0;
}
bytes_to_write = bytes_left_till_metadata(client);
if (bytes_to_write == 0) {
gint metadata_to_write;
metadata_to_write = client->metadata_current_position;
if (!client->metadata_sent) {
status = write_page_to_channel(source,
client->metadata,
metadata_to_write,
&bytes_written, &error);
client->metadata_current_position += bytes_written;
if (client->metadata->size
- client->metadata_current_position == 0) {
client->metadata_fill = 0;
client->metadata_current_position = 0;
client->metadata_sent = true;
}
} else {
struct page *empty_meta;
guchar empty_data = 0;
empty_meta = page_new_copy(&empty_data, 1);
status = write_page_to_channel(source,
empty_meta,
metadata_to_write,
&bytes_written, &error);
client->metadata_current_position += bytes_written;
if (empty_meta->size
- client->metadata_current_position == 0) {
client->metadata_fill = 0;
client->metadata_current_position = 0;
}
}
bytes_written = 0;
} else {
status = write_n_bytes_to_channel(source, client->current_page,
client->current_position, bytes_to_write,
&bytes_written, &error);
}
switch (status) {
case G_IO_STATUS_NORMAL:
client->current_position += bytes_written;
assert(client->current_position <= client->current_page->size);
if (client->metadata_requested)
client->metadata_fill += bytes_written;
if (client->current_position >= client->current_page->size) {
page_unref(client->current_page);
client->current_page = NULL;
if (g_queue_is_empty(client->pages)) {
/* all pages are sent: remove the
event source */
client->write_source_id = 0;
g_mutex_unlock(httpd->mutex);
return false;
}
}
g_mutex_unlock(httpd->mutex);
return true;
case G_IO_STATUS_AGAIN:
g_mutex_unlock(httpd->mutex);
return true;
case G_IO_STATUS_EOF:
/* client has disconnected */
httpd_client_close(client);
g_mutex_unlock(httpd->mutex);
return false;
case G_IO_STATUS_ERROR:
/* I/O error */
g_warning("failed to write to client: %s", error->message);
g_error_free(error);
httpd_client_close(client);
g_mutex_unlock(httpd->mutex);
return false;
}
/* unreachable */
httpd_client_close(client);
g_mutex_unlock(httpd->mutex);
return false;
}
void
httpd_client_send(struct httpd_client *client, struct page *page)
{
if (client->state != RESPONSE)
/* the client is still writing the HTTP request */
return;
page_ref(page);
g_queue_push_tail(client->pages, page);
if (client->write_source_id == 0)
client->write_source_id =
g_io_add_watch(client->channel, G_IO_OUT,
httpd_client_out_event, client);
}
void
httpd_client_send_metadata(struct httpd_client *client, struct page *page)
{
if (client->metadata) {
page_unref(client->metadata);
client->metadata = NULL;
}
g_return_if_fail (page);
page_ref(page);
client->metadata = page;
client->metadata_sent = false;
}

70
src/output/httpd_client.h
View File

@ -1,70 +0,0 @@
/*
* Copyright (C) 2003-2011 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_OUTPUT_HTTPD_CLIENT_H
#define MPD_OUTPUT_HTTPD_CLIENT_H
#include <stdbool.h>
#include <stddef.h>
struct httpd_client;
struct httpd_output;
struct page;
/**
* Creates a new #httpd_client object
*
* @param httpd the HTTP output device
* @param fd the socket file descriptor
*/
struct httpd_client *
httpd_client_new(struct httpd_output *httpd, int fd, bool metadata_supported);
/**
* Frees memory and resources allocated by the #httpd_client object.
* This does not remove it from the #httpd_output object.
*/
void
httpd_client_free(struct httpd_client *client);
/**
* Returns the total size of this client's page queue.
*/
size_t
httpd_client_queue_size(const struct httpd_client *client);
/**
* Clears the page queue.
*/
void
httpd_client_cancel(struct httpd_client *client);
/**
* Appends a page to the client's queue.
*/
void
httpd_client_send(struct httpd_client *client, struct page *page);
/**
* Sends the passed metadata.
*/
void
httpd_client_send_metadata(struct httpd_client *client, struct page *page);
#endif