diff options
Diffstat (limited to 'src/output/httpd_client.c')
| -rw-r--r-- | src/output/httpd_client.c | 764 |
1 files changed, 0 insertions, 764 deletions
diff --git a/src/output/httpd_client.c b/src/output/httpd_client.c deleted file mode 100644 index 72de9045..00000000 --- a/src/output/httpd_client.c +++ /dev/null @@ -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 "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; -} |