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-rw-r--r--libav/http.c318
1 files changed, 318 insertions, 0 deletions
diff --git a/libav/http.c b/libav/http.c
new file mode 100644
index 0000000000..824f98b9e3
--- /dev/null
+++ b/libav/http.c
@@ -0,0 +1,318 @@
+/*
+ * HTTP protocol for ffmpeg client
+ * Copyright (c) 2000, 2001 Gerard Lantau.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <ctype.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+
+#include "avformat.h"
+
+/* XXX: POST protocol is not completly implemented because ffmpeg use
+ only a subset of it */
+
+//#define DEBUG
+
+/* used for protocol handling */
+#define BUFFER_SIZE 1024
+#define URL_SIZE 4096
+
+typedef struct {
+ int fd;
+ unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
+ int line_count;
+ int http_code;
+ char location[URL_SIZE];
+} HTTPContext;
+
+static int http_connect(URLContext *h, const char *path);
+static int http_write(URLContext *h, UINT8 *buf, int size);
+
+/* return non zero if error */
+static int http_open(URLContext *h, const char *uri, int flags)
+{
+ struct sockaddr_in dest_addr;
+ const char *p, *path, *proxy_path;
+ char hostname[1024], *q;
+ int port, fd = -1, use_proxy;
+ struct hostent *hp;
+ HTTPContext *s;
+
+ h->is_streamed = 1;
+
+ s = malloc(sizeof(HTTPContext));
+ if (!s) {
+ return -ENOMEM;
+ }
+ h->priv_data = s;
+
+ proxy_path = getenv("http_proxy");
+ use_proxy = (proxy_path != NULL) && !getenv("no_proxy");
+
+ /* fill the dest addr */
+ redo:
+ if (use_proxy) {
+ p = proxy_path;
+ } else {
+ p = uri;
+ }
+ if (!strstart(p, "http://", &p))
+ goto fail;
+ q = hostname;
+ while (*p != ':' && *p != '/' && *p != '\0') {
+ if ((q - hostname) < sizeof(hostname) - 1)
+ *q++ = *p;
+ p++;
+ }
+ *q = '\0';
+ port = 80;
+ if (*p == ':') {
+ p++;
+ port = strtoul(p, (char **)&p, 10);
+ }
+ if (port <= 0)
+ goto fail;
+ if (use_proxy) {
+ path = uri;
+ } else {
+ if (*p == '\0')
+ path = "/";
+ else
+ path = p;
+ }
+
+ dest_addr.sin_family = AF_INET;
+ dest_addr.sin_port = htons(port);
+ if ((inet_aton(hostname, &dest_addr.sin_addr)) == 0) {
+ hp = gethostbyname(hostname);
+ if (!hp)
+ goto fail;
+ memcpy (&dest_addr.sin_addr, hp->h_addr, sizeof(dest_addr.sin_addr));
+ }
+
+ fd = socket(PF_INET, SOCK_STREAM, 0);
+ if (fd < 0)
+ goto fail;
+
+ if (connect(fd, (struct sockaddr *)&dest_addr,
+ sizeof(dest_addr)) < 0)
+ goto fail;
+
+ s->fd = fd;
+ if (http_connect(h, path) < 0)
+ goto fail;
+ if (s->http_code == 303 && s->location[0] != '\0') {
+ /* url moved, get next */
+ uri = s->location;
+ goto redo;
+ }
+
+ return 0;
+ fail:
+ if (fd >= 0)
+ close(fd);
+ free(s);
+ return -EIO;
+}
+
+static int http_getc(HTTPContext *s)
+{
+ int len;
+ if (s->buf_ptr >= s->buf_end) {
+ redo:
+ len = read(s->fd, s->buffer, BUFFER_SIZE);
+ if (len < 0) {
+ if (errno == EAGAIN || errno == EINTR)
+ goto redo;
+ return -EIO;
+ } else if (len == 0) {
+ return -1;
+ } else {
+ s->buf_ptr = s->buffer;
+ s->buf_end = s->buffer + len;
+ }
+ }
+ return *s->buf_ptr++;
+}
+
+static int process_line(HTTPContext *s, char *line, int line_count)
+{
+ char *tag, *p;
+
+ /* end of header */
+ if (line[0] == '\0')
+ return 0;
+
+ p = line;
+ if (line_count == 0) {
+ while (!isspace(*p) && *p != '\0')
+ p++;
+ while (isspace(*p))
+ p++;
+ s->http_code = strtol(p, NULL, 10);
+#ifdef DEBUG
+ printf("http_code=%d\n", s->http_code);
+#endif
+ } else {
+ while (*p != '\0' && *p != ':')
+ p++;
+ if (*p != ':')
+ return 1;
+
+ *p = '\0';
+ tag = line;
+ p++;
+ while (isspace(*p))
+ p++;
+ if (!strcmp(tag, "Location")) {
+ strcpy(s->location, p);
+ }
+ }
+ return 1;
+}
+
+static int http_connect(URLContext *h, const char *path)
+{
+ HTTPContext *s = h->priv_data;
+ int post, err, ch;
+ char line[1024], *q;
+
+
+ /* send http header */
+ post = h->flags & URL_WRONLY;
+
+ snprintf(s->buffer, sizeof(s->buffer),
+ "%s %s HTTP/1.0\n"
+ "User-Agent: FFmpeg %s\n"
+ "Accept: */*\n"
+ "\n",
+ post ? "POST" : "GET",
+ path,
+ FFMPEG_VERSION
+ );
+
+ if (http_write(h, s->buffer, strlen(s->buffer)) < 0)
+ return -EIO;
+
+ /* init input buffer */
+ s->buf_ptr = s->buffer;
+ s->buf_end = s->buffer;
+ s->line_count = 0;
+ s->location[0] = '\0';
+ if (post)
+ return 0;
+
+ /* wait for header */
+ q = line;
+ for(;;) {
+ ch = http_getc(s);
+ if (ch < 0)
+ return -EIO;
+ if (ch == '\n') {
+ /* process line */
+ if (q > line && q[-1] == '\r')
+ q--;
+ *q = '\0';
+#ifdef DEBUG
+ printf("header='%s'\n", line);
+#endif
+ err = process_line(s, line, s->line_count);
+ if (err < 0)
+ return err;
+ if (err == 0)
+ return 0;
+ s->line_count++;
+ q = line;
+ } else {
+ if ((q - line) < sizeof(line) - 1)
+ *q++ = ch;
+ }
+ }
+}
+
+
+static int http_read(URLContext *h, UINT8 *buf, int size)
+{
+ HTTPContext *s = h->priv_data;
+ int size1, len;
+
+ size1 = size;
+ while (size > 0) {
+ /* read bytes from input buffer first */
+ len = s->buf_end - s->buf_ptr;
+ if (len > 0) {
+ if (len > size)
+ len = size;
+ memcpy(buf, s->buf_ptr, len);
+ s->buf_ptr += len;
+ } else {
+ len = read (s->fd, buf, size);
+ if (len < 0) {
+ if (errno != EINTR && errno != EAGAIN)
+ return -errno;
+ else
+ continue;
+ } else if (len == 0) {
+ break;
+ }
+ }
+ size -= len;
+ buf += len;
+ }
+ return size1 - size;
+}
+
+/* used only when posting data */
+static int http_write(URLContext *h, UINT8 *buf, int size)
+{
+ HTTPContext *s = h->priv_data;
+ int ret, size1;
+
+ size1 = size;
+ while (size > 0) {
+ ret = write (s->fd, buf, size);
+ if (ret < 0 && errno != EINTR && errno != EAGAIN)
+ return -errno;
+ size -= ret;
+ buf += ret;
+ }
+ return size1 - size;
+}
+
+static int http_close(URLContext *h)
+{
+ HTTPContext *s = h->priv_data;
+ close(s->fd);
+ return 0;
+}
+
+URLProtocol http_protocol = {
+ "http",
+ http_open,
+ http_read,
+ http_write,
+ NULL, /* seek */
+ http_close,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-01 01:06:26 +0000