77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include "http.h"
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#include "buffer.h"
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#include "buffer_lock.h"
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DEFINE_BUFFER_LOCK(http_jpeg);
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#define PART_BOUNDARY "123456789000000000000987654321"
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#define CONTENT_TYPE "image/jpeg"
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#define CONTENT_LENGTH "Content-Length"
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static const char *const STREAM_HEADER = "HTTP/1.0 200 OK\r\n"
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"Access-Control-Allow-Origin: *\r\n"
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"Connection: close\r\n"
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"Content-Type: multipart/x-mixed-replace;boundary=" PART_BOUNDARY "\r\n"
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"\r\n"
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"--" PART_BOUNDARY "\r\n";
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static const char *const STREAM_ERROR = "Content-Type: text/plain\r\n"
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"\r\n"
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"Error: %d (%s).\r\n"
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"--" PART_BOUNDARY "\r\n";
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static const char *const STREAM_TIMEDOUT = "Content-Type: text/plain\r\n"
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"\r\n"
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"Timedout.\r\n"
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"--" PART_BOUNDARY "\r\n";
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static const char *const STREAM_PART = "Content-Type: " CONTENT_TYPE "\r\n" CONTENT_LENGTH ": %u\r\n\r\n";
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static const char *const STREAM_BOUNDARY = "\r\n"
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"--" PART_BOUNDARY "\r\n";
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void http_jpeg_capture(buffer_t *buf)
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{
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buffer_lock_capture(&http_jpeg, buf);
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}
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void http_snapshot(http_worker_t *worker, FILE *stream)
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{
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int counter = 0;
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buffer_t *buf = buffer_lock_get(&http_jpeg, 1, &counter);
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if (!buf) {
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http_404_header(worker, stream);
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fprintf(stream, "No snapshot captured yet.\r\n");
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return;
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}
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fprintf(stream, "HTTP/1.1 200 OK\r\n");
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fprintf(stream, "Content-Type: image/jpeg\r\n");
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fprintf(stream, "Content-Length: %d\r\n", buf->used);
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fprintf(stream, "\r\n");
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fwrite(buf->start, buf->used, 1, stream);
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buffer_consumed(buf);
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}
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void http_stream(http_worker_t *worker, FILE *stream)
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{
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int counter = 0;
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fprintf(stream, STREAM_HEADER);
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while (!feof(stream)) {
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buffer_t *buf = buffer_lock_get(&http_jpeg, 3, &counter);
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if (!buf) {
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fprintf(stream, STREAM_ERROR, -1, "No frames.");
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return;
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}
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fprintf(stream, STREAM_PART, buf->used);
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fwrite(buf->start, buf->used, 1, stream);
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fprintf(stream, STREAM_BOUNDARY);
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buffer_consumed(buf);
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}
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}
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