Initial revision

Originally committed as revision 5 to svn://svn.ffmpeg.org/ffmpeg/trunk

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,
+};