+++ /dev/null
-#include "httpd.h"
-
-#include <assert.h>
-#include <byteswap.h>
-#include <endian.h>
-#include <microhttpd.h>
-#include <netinet/in.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/time.h>
-#include <time.h>
-#include <memory>
-extern "C" {
-#include <libavutil/avutil.h>
-}
-
-#include "defs.h"
-#include "metacube2.h"
-#include "metrics.h"
-
-struct MHD_Connection;
-struct MHD_Response;
-
-using namespace std;
-
-HTTPD::HTTPD()
-{
- global_metrics.add("num_connected_clients", &metric_num_connected_clients, Metrics::TYPE_GAUGE);
-}
-
-HTTPD::~HTTPD()
-{
- stop();
-}
-
-void HTTPD::start(int port)
-{
- mhd = MHD_start_daemon(MHD_USE_THREAD_PER_CONNECTION | MHD_USE_POLL_INTERNALLY | MHD_USE_DUAL_STACK,
- port,
- nullptr, nullptr,
- &answer_to_connection_thunk, this,
- MHD_OPTION_NOTIFY_COMPLETED, nullptr, this,
- MHD_OPTION_END);
- if (mhd == nullptr) {
- fprintf(stderr, "Warning: Could not open HTTP server. (Port already in use?)\n");
- }
-}
-
-void HTTPD::stop()
-{
- if (mhd) {
- MHD_quiesce_daemon(mhd);
- for (Stream *stream : streams) {
- stream->stop();
- }
- MHD_stop_daemon(mhd);
- mhd = nullptr;
- }
-}
-
-void HTTPD::add_data(const char *buf, size_t size, bool keyframe, int64_t time, AVRational timebase)
-{
- unique_lock<mutex> lock(streams_mutex);
- for (Stream *stream : streams) {
- stream->add_data(buf, size, keyframe ? Stream::DATA_TYPE_KEYFRAME : Stream::DATA_TYPE_OTHER, time, timebase);
- }
-}
-
-int HTTPD::answer_to_connection_thunk(void *cls, MHD_Connection *connection,
- const char *url, const char *method,
- const char *version, const char *upload_data,
- size_t *upload_data_size, void **con_cls)
-{
- HTTPD *httpd = (HTTPD *)cls;
- return httpd->answer_to_connection(connection, url, method, version, upload_data, upload_data_size, con_cls);
-}
-
-int HTTPD::answer_to_connection(MHD_Connection *connection,
- const char *url, const char *method,
- const char *version, const char *upload_data,
- size_t *upload_data_size, void **con_cls)
-{
- // See if the URL ends in “.metacube”.
- HTTPD::Stream::Framing framing;
- if (strstr(url, ".metacube") == url + strlen(url) - strlen(".metacube")) {
- framing = HTTPD::Stream::FRAMING_METACUBE;
- } else {
- framing = HTTPD::Stream::FRAMING_RAW;
- }
-
- if (strcmp(url, "/metrics") == 0) {
- string contents = global_metrics.serialize();
- MHD_Response *response = MHD_create_response_from_buffer(
- contents.size(), &contents[0], MHD_RESPMEM_MUST_COPY);
- MHD_add_response_header(response, "Content-type", "text/plain");
- int ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
- MHD_destroy_response(response); // Only decreases the refcount; actual free is after the request is done.
- return ret;
- }
- if (endpoints.count(url)) {
- pair<string, string> contents_and_type = endpoints[url].callback();
- MHD_Response *response = MHD_create_response_from_buffer(
- contents_and_type.first.size(), &contents_and_type.first[0], MHD_RESPMEM_MUST_COPY);
- MHD_add_response_header(response, "Content-type", contents_and_type.second.c_str());
- if (endpoints[url].cors_policy == ALLOW_ALL_ORIGINS) {
- MHD_add_response_header(response, "Access-Control-Allow-Origin", "*");
- }
- int ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
- MHD_destroy_response(response); // Only decreases the refcount; actual free is after the request is done.
- return ret;
- }
-
- // Small hack; reject unknown /channels/foo.
- if (string(url).find("/channels/") == 0) {
- string contents = "Not found.";
- MHD_Response *response = MHD_create_response_from_buffer(
- contents.size(), &contents[0], MHD_RESPMEM_MUST_COPY);
- MHD_add_response_header(response, "Content-type", "text/plain");
- int ret = MHD_queue_response(connection, MHD_HTTP_NOT_FOUND, response);
- MHD_destroy_response(response); // Only decreases the refcount; actual free is after the request is done.
- return ret;
- }
-
- HTTPD::Stream *stream = new HTTPD::Stream(this, framing);
- stream->add_data(header.data(), header.size(), Stream::DATA_TYPE_HEADER, AV_NOPTS_VALUE, AVRational{ 1, 0 });
- {
- unique_lock<mutex> lock(streams_mutex);
- streams.insert(stream);
- }
- ++metric_num_connected_clients;
- *con_cls = stream;
-
- // Does not strictly have to be equal to MUX_BUFFER_SIZE.
- MHD_Response *response = MHD_create_response_from_callback(
- (size_t)-1, MUX_BUFFER_SIZE, &HTTPD::Stream::reader_callback_thunk, stream, &HTTPD::free_stream);
- // TODO: Content-type?
- if (framing == HTTPD::Stream::FRAMING_METACUBE) {
- MHD_add_response_header(response, "Content-encoding", "metacube");
- }
-
- int ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
- MHD_destroy_response(response); // Only decreases the refcount; actual free is after the request is done.
-
- return ret;
-}
-
-void HTTPD::free_stream(void *cls)
-{
- HTTPD::Stream *stream = (HTTPD::Stream *)cls;
- HTTPD *httpd = stream->get_parent();
- {
- unique_lock<mutex> lock(httpd->streams_mutex);
- delete stream;
- httpd->streams.erase(stream);
- }
- --httpd->metric_num_connected_clients;
-}
-
-ssize_t HTTPD::Stream::reader_callback_thunk(void *cls, uint64_t pos, char *buf, size_t max)
-{
- HTTPD::Stream *stream = (HTTPD::Stream *)cls;
- return stream->reader_callback(pos, buf, max);
-}
-
-ssize_t HTTPD::Stream::reader_callback(uint64_t pos, char *buf, size_t max)
-{
- unique_lock<mutex> lock(buffer_mutex);
- has_buffered_data.wait(lock, [this]{ return should_quit || !buffered_data.empty(); });
- if (should_quit) {
- return 0;
- }
-
- ssize_t ret = 0;
- while (max > 0 && !buffered_data.empty()) {
- const string &s = buffered_data.front();
- assert(s.size() > used_of_buffered_data);
- size_t len = s.size() - used_of_buffered_data;
- if (max >= len) {
- // Consume the entire (rest of the) string.
- memcpy(buf, s.data() + used_of_buffered_data, len);
- buf += len;
- ret += len;
- max -= len;
- buffered_data.pop_front();
- used_of_buffered_data = 0;
- } else {
- // We don't need the entire string; just use the first part of it.
- memcpy(buf, s.data() + used_of_buffered_data, max);
- buf += max;
- used_of_buffered_data += max;
- ret += max;
- max = 0;
- }
- }
-
- return ret;
-}
-
-void HTTPD::Stream::add_data(const char *buf, size_t buf_size, HTTPD::Stream::DataType data_type, int64_t time, AVRational timebase)
-{
- if (buf_size == 0) {
- return;
- }
- if (data_type == DATA_TYPE_KEYFRAME) {
- seen_keyframe = true;
- } else if (data_type == DATA_TYPE_OTHER && !seen_keyframe) {
- // Start sending only once we see a keyframe.
- return;
- }
-
- unique_lock<mutex> lock(buffer_mutex);
-
- if (framing == FRAMING_METACUBE) {
- int flags = 0;
- if (data_type == DATA_TYPE_HEADER) {
- flags |= METACUBE_FLAGS_HEADER;
- } else if (data_type == DATA_TYPE_OTHER) {
- flags |= METACUBE_FLAGS_NOT_SUITABLE_FOR_STREAM_START;
- }
-
- // If we're about to send a keyframe, send a pts metadata block
- // to mark its time.
- if ((flags & METACUBE_FLAGS_NOT_SUITABLE_FOR_STREAM_START) == 0 && time != AV_NOPTS_VALUE) {
- metacube2_pts_packet packet;
- packet.type = htobe64(METACUBE_METADATA_TYPE_NEXT_BLOCK_PTS);
- packet.pts = htobe64(time);
- packet.timebase_num = htobe64(timebase.num);
- packet.timebase_den = htobe64(timebase.den);
-
- metacube2_block_header hdr;
- memcpy(hdr.sync, METACUBE2_SYNC, sizeof(hdr.sync));
- hdr.size = htonl(sizeof(packet));
- hdr.flags = htons(METACUBE_FLAGS_METADATA);
- hdr.csum = htons(metacube2_compute_crc(&hdr));
- buffered_data.emplace_back((char *)&hdr, sizeof(hdr));
- buffered_data.emplace_back((char *)&packet, sizeof(packet));
- }
-
- metacube2_block_header hdr;
- memcpy(hdr.sync, METACUBE2_SYNC, sizeof(hdr.sync));
- hdr.size = htonl(buf_size);
- hdr.flags = htons(flags);
- hdr.csum = htons(metacube2_compute_crc(&hdr));
- buffered_data.emplace_back((char *)&hdr, sizeof(hdr));
- }
- buffered_data.emplace_back(buf, buf_size);
-
- // Send a Metacube2 timestamp every keyframe.
- if (framing == FRAMING_METACUBE && data_type == DATA_TYPE_KEYFRAME) {
- timespec now;
- clock_gettime(CLOCK_REALTIME, &now);
-
- metacube2_timestamp_packet packet;
- packet.type = htobe64(METACUBE_METADATA_TYPE_ENCODER_TIMESTAMP);
- packet.tv_sec = htobe64(now.tv_sec);
- packet.tv_nsec = htobe64(now.tv_nsec);
-
- metacube2_block_header hdr;
- memcpy(hdr.sync, METACUBE2_SYNC, sizeof(hdr.sync));
- hdr.size = htonl(sizeof(packet));
- hdr.flags = htons(METACUBE_FLAGS_METADATA);
- hdr.csum = htons(metacube2_compute_crc(&hdr));
- buffered_data.emplace_back((char *)&hdr, sizeof(hdr));
- buffered_data.emplace_back((char *)&packet, sizeof(packet));
- }
-
- has_buffered_data.notify_all();
-}
-
-void HTTPD::Stream::stop()
-{
- unique_lock<mutex> lock(buffer_mutex);
- should_quit = true;
- has_buffered_data.notify_all();
-}
projects / nageru / blobdiff