Reverting stray commit part II, r8156 had the base64 export patch mixed with the nutdec patch

Originally committed as revision 8158 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 348 insertions, 0 deletions

diff --git a/libavformat/http.c b/libavformat/http.c
new file mode 100644
index 0000000000..1284c31de8
--- /dev/null
+++ b/libavformat/http.c
@@ -0,0 +1,348 @@
+/*
+ * HTTP protocol for ffmpeg client
+ * Copyright (c) 2000, 2001 Fabrice Bellard.
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include "avformat.h"
+#include <unistd.h>
+#include "network.h"
+
+#include "base64.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
+#define MAX_REDIRECTS 8
+
+typedef struct {
+    URLContext *hd;
+    unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
+    int line_count;
+    int http_code;
+    offset_t off, filesize;
+    char location[URL_SIZE];
+} HTTPContext;
+
+static int http_connect(URLContext *h, const char *path, const char *hoststr,
+                        const char *auth, int *new_location);
+static int http_write(URLContext *h, uint8_t *buf, int size);
+
+
+/* return non zero if error */
+static int http_open_cnx(URLContext *h)
+{
+    const char *path, *proxy_path;
+    char hostname[1024], hoststr[1024];
+    char auth[1024];
+    char path1[1024];
+    char buf[1024];
+    int port, use_proxy, err, location_changed = 0, redirects = 0;
+    HTTPContext *s = h->priv_data;
+    URLContext *hd = NULL;
+
+    proxy_path = getenv("http_proxy");
+    use_proxy = (proxy_path != NULL) && !getenv("no_proxy") &&
+        strstart(proxy_path, "http://", NULL);
+
+    /* fill the dest addr */
+ redo:
+    /* needed in any case to build the host string */
+    url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
+              path1, sizeof(path1), s->location);
+    if (port > 0) {
+        snprintf(hoststr, sizeof(hoststr), "%s:%d", hostname, port);
+    } else {
+        pstrcpy(hoststr, sizeof(hoststr), hostname);
+    }
+
+    if (use_proxy) {
+        url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
+                  NULL, 0, proxy_path);
+        path = s->location;
+    } else {
+        if (path1[0] == '\0')
+            path = "/";
+        else
+            path = path1;
+    }
+    if (port < 0)
+        port = 80;
+
+    snprintf(buf, sizeof(buf), "tcp://%s:%d", hostname, port);
+    err = url_open(&hd, buf, URL_RDWR);
+    if (err < 0)
+        goto fail;
+
+    s->hd = hd;
+    if (http_connect(h, path, hoststr, auth, &location_changed) < 0)
+        goto fail;
+    if (s->http_code == 303 && location_changed == 1) {
+        /* url moved, get next */
+        url_close(hd);
+        if (redirects++ >= MAX_REDIRECTS)
+            return AVERROR_IO;
+        location_changed = 0;
+        goto redo;
+    }
+    return 0;
+ fail:
+    if (hd)
+        url_close(hd);
+    return AVERROR_IO;
+}
+
+static int http_open(URLContext *h, const char *uri, int flags)
+{
+    HTTPContext *s;
+    int ret;
+
+    h->is_streamed = 1;
+
+    s = av_malloc(sizeof(HTTPContext));
+    if (!s) {
+        return AVERROR(ENOMEM);
+    }
+    h->priv_data = s;
+    s->filesize = -1;
+    s->off = 0;
+    pstrcpy (s->location, URL_SIZE, uri);
+
+    ret = http_open_cnx(h);
+    if (ret != 0)
+        av_free (s);
+    return ret;
+}
+static int http_getc(HTTPContext *s)
+{
+    int len;
+    if (s->buf_ptr >= s->buf_end) {
+        len = url_read(s->hd, s->buffer, BUFFER_SIZE);
+        if (len < 0) {
+            return AVERROR_IO;
+        } 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(URLContext *h, char *line, int line_count,
+                        int *new_location)
+{
+    HTTPContext *s = h->priv_data;
+    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);
+            *new_location = 1;
+        } else if (!strcmp (tag, "Content-Length") && s->filesize == -1) {
+            s->filesize = atoll(p);
+        } else if (!strcmp (tag, "Content-Range")) {
+            /* "bytes $from-$to/$document_size" */
+            const char *slash;
+            if (!strncmp (p, "bytes ", 6)) {
+                p += 6;
+                s->off = atoll(p);
+                if ((slash = strchr(p, '/')) && strlen(slash) > 0)
+                    s->filesize = atoll(slash+1);
+            }
+            h->is_streamed = 0; /* we _can_ in fact seek */
+        }
+    }
+    return 1;
+}
+
+static int http_connect(URLContext *h, const char *path, const char *hoststr,
+                        const char *auth, int *new_location)
+{
+    HTTPContext *s = h->priv_data;
+    int post, err, ch;
+    char line[1024], *q;
+    char *auth_b64;
+    offset_t off = s->off;
+
+
+    /* send http header */
+    post = h->flags & URL_WRONLY;
+
+    auth_b64 = av_base64_encode((uint8_t *)auth, strlen(auth));
+    snprintf(s->buffer, sizeof(s->buffer),
+             "%s %s HTTP/1.1\r\n"
+             "User-Agent: %s\r\n"
+             "Accept: */*\r\n"
+             "Range: bytes=%"PRId64"-\r\n"
+             "Host: %s\r\n"
+             "Authorization: Basic %s\r\n"
+             "\r\n",
+             post ? "POST" : "GET",
+             path,
+             LIBAVFORMAT_IDENT,
+             s->off,
+             hoststr,
+             auth_b64);
+
+    av_freep(&auth_b64);
+    if (http_write(h, s->buffer, strlen(s->buffer)) < 0)
+        return AVERROR_IO;
+
+    /* init input buffer */
+    s->buf_ptr = s->buffer;
+    s->buf_end = s->buffer;
+    s->line_count = 0;
+    s->off = 0;
+    if (post) {
+        sleep(1);
+        return 0;
+    }
+
+    /* wait for header */
+    q = line;
+    for(;;) {
+        ch = http_getc(s);
+        if (ch < 0)
+            return AVERROR_IO;
+        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(h, line, s->line_count, new_location);
+            if (err < 0)
+                return err;
+            if (err == 0)
+                break;
+            s->line_count++;
+            q = line;
+        } else {
+            if ((q - line) < sizeof(line) - 1)
+                *q++ = ch;
+        }
+    }
+
+    return (off == s->off) ? 0 : -1;
+}
+
+
+static int http_read(URLContext *h, uint8_t *buf, int size)
+{
+    HTTPContext *s = h->priv_data;
+    int len;
+
+    /* 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 = url_read(s->hd, buf, size);
+    }
+    if (len > 0)
+        s->off += len;
+    return len;
+}
+
+/* used only when posting data */
+static int http_write(URLContext *h, uint8_t *buf, int size)
+{
+    HTTPContext *s = h->priv_data;
+    return url_write(s->hd, buf, size);
+}
+
+static int http_close(URLContext *h)
+{
+    HTTPContext *s = h->priv_data;
+    url_close(s->hd);
+    av_free(s);
+    return 0;
+}
+
+static offset_t http_seek(URLContext *h, offset_t off, int whence)
+{
+    HTTPContext *s = h->priv_data;
+    URLContext *old_hd = s->hd;
+    offset_t old_off = s->off;
+
+    if (whence == AVSEEK_SIZE)
+        return s->filesize;
+    else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
+        return -1;
+
+    /* we save the old context in case the seek fails */
+    s->hd = NULL;
+    if (whence == SEEK_CUR)
+        off += s->off;
+    else if (whence == SEEK_END)
+        off += s->filesize;
+    s->off = off;
+
+    /* if it fails, continue on old connection */
+    if (http_open_cnx(h) < 0) {
+        s->hd = old_hd;
+        s->off = old_off;
+        return -1;
+    }
+    url_close(old_hd);
+    return off;
+}
+
+URLProtocol http_protocol = {
+    "http",
+    http_open,
+    http_read,
+    http_write,
+    http_seek,
+    http_close,
+};