1 files changed, 271 insertions, 30 deletions

diff --git a/Source/CTest/Curl/content_encoding.c b/Source/CTest/Curl/content_encoding.c
index e20e26e..b786e3f 100644
--- a/Source/CTest/Curl/content_encoding.c
+++ b/Source/CTest/Curl/content_encoding.c
@@ -1,16 +1,16 @@
 /***************************************************************************
- *                                  _   _ ____  _     
- *  Project                     ___| | | |  _ \| |    
- *                             / __| | | | |_) | |    
- *                            | (__| |_| |  _ <| |___ 
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2002, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2004, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
  * are also available at http://curl.haxx.se/docs/copyright.html.
- * 
+ *
  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
  * copies of the Software, and permit persons to whom the Software is
  * furnished to do so, under the terms of the COPYING file.
@@ -25,13 +25,29 @@
 
 #ifdef HAVE_LIBZ
 
+#include <stdlib.h>
+#include <string.h>
+
 #include "urldata.h"
 #include <curl/curl.h>
-#include <curl/types.h>
 #include "sendf.h"
+#include "content_encoding.h"
+#include "memory.h"
+
+#include "memdebug.h"
 
-#define DSIZ 4096               /* buffer size for decompressed data */
+#define DSIZ 0x10000             /* buffer size for decompressed data */
 
+#define GZIP_MAGIC_0 0x1f
+#define GZIP_MAGIC_1 0x8b
+
+/* gzip flag byte */
+#define ASCII_FLAG   0x01 /* bit 0 set: file probably ascii text */
+#define HEAD_CRC     0x02 /* bit 1 set: header CRC present */
+#define EXTRA_FIELD  0x04 /* bit 2 set: extra field present */
+#define ORIG_NAME    0x08 /* bit 3 set: original file name present */
+#define COMMENT      0x10 /* bit 4 set: file comment present */
+#define RESERVED     0xE0 /* bits 5..7: reserved */
 
 static CURLcode
 process_zlib_error(struct SessionHandle *data, z_stream *z)
@@ -55,28 +71,30 @@ exit_zlib(z_stream *z, bool *zlib_init, CURLcode result)
 }
 
 CURLcode
-Curl_unencode_deflate_write(struct SessionHandle *data, 
+Curl_unencode_deflate_write(struct SessionHandle *data,
                             struct Curl_transfer_keeper *k,
                             ssize_t nread)
 {
   int status;                   /* zlib status */
-  int result;                   /* Curl_client_write status */
+  CURLcode result = CURLE_OK;   /* Curl_client_write status */
   char decomp[DSIZ];            /* Put the decompressed data here. */
   z_stream *z = &k->z;          /* zlib state structure */
-              
+
   /* Initialize zlib? */
   if (!k->zlib_init) {
     z->zalloc = (alloc_func)Z_NULL;
     z->zfree = (free_func)Z_NULL;
-    z->opaque = 0;              /* of dubious use 08/27/02 jhrg */
+    z->opaque = 0;
+    z->next_in = NULL;
+    z->avail_in = 0;
     if (inflateInit(z) != Z_OK)
       return process_zlib_error(data, z);
     k->zlib_init = 1;
   }
 
-  /* Set the compressed input when this fucntion is called */
+  /* Set the compressed input when this function is called */
   z->next_in = (Bytef *)k->str;
-  z->avail_in = nread;
+  z->avail_in = (uInt)nread;
 
   /* because the buffer size is fixed, iteratively decompress
      and transfer to the client via client_write. */
@@ -87,36 +105,259 @@ Curl_unencode_deflate_write(struct SessionHandle *data,
 
     status = inflate(z, Z_SYNC_FLUSH);
     if (status == Z_OK || status == Z_STREAM_END) {
-      result = Curl_client_write(data, CLIENTWRITE_BODY, decomp, 
-                                 DSIZ - z->avail_out);
-      /* if !CURLE_OK, clean up, return */
-      if (result) {              
-        return exit_zlib(z, &k->zlib_init, (CURLcode)result);
+      if (DSIZ - z->avail_out) {
+        result = Curl_client_write(data, CLIENTWRITE_BODY, decomp,
+                                   DSIZ - z->avail_out);
+        /* if !CURLE_OK, clean up, return */
+        if (result)
+          return exit_zlib(z, &k->zlib_init, result);
       }
 
       /* Done?; clean up, return */
       if (status == Z_STREAM_END) {
         if (inflateEnd(z) == Z_OK)
-          return exit_zlib(z, &k->zlib_init, (CURLcode)result);
+          return exit_zlib(z, &k->zlib_init, result);
         else
           return exit_zlib(z, &k->zlib_init, process_zlib_error(data, z));
       }
 
       /* Done with these bytes, exit */
-      if (status == Z_OK && z->avail_in == 0 && z->avail_out > 0) 
-        return (CURLcode)result;
+      if (status == Z_OK && z->avail_in == 0 && z->avail_out > 0)
+        return result;
     }
     else {                      /* Error; exit loop, handle below */
       return exit_zlib(z, &k->zlib_init, process_zlib_error(data, z));
     }
   }
 }
-#endif /* HAVE_LIBZ */
 
-/*
- * local variables:
- * eval: (load-file "../curl-mode.el")
- * end:
- * vim600: fdm=marker
- * vim: et sw=2 ts=2 sts=2 tw=78
- */
+/* Skip over the gzip header */
+static enum {
+  GZIP_OK,
+  GZIP_BAD,
+  GZIP_UNDERFLOW
+} check_gzip_header(unsigned char const *data, ssize_t len, ssize_t *headerlen)
+{
+  int method, flags;
+  const ssize_t totallen = len;
+
+  /* The shortest header is 10 bytes */
+  if (len < 10)
+    return GZIP_UNDERFLOW;
+
+  if ((data[0] != GZIP_MAGIC_0) || (data[1] != GZIP_MAGIC_1))
+    return GZIP_BAD;
+
+  method = data[2];
+  flags = data[3];
+
+  if (method != Z_DEFLATED || (flags & RESERVED) != 0) {
+    /* Can't handle this compression method or unknown flag */
+    return GZIP_BAD;
+  }
+
+  /* Skip over time, xflags, OS code and all previous bytes */
+  len -= 10;
+  data += 10;
+
+  if (flags & EXTRA_FIELD) {
+    ssize_t extra_len;
+
+    if (len < 2)
+      return GZIP_UNDERFLOW;
+
+    extra_len = (data[1] << 8) | data[0];
+
+    if (len < (extra_len+2))
+      return GZIP_UNDERFLOW;
+
+    len -= (extra_len + 2);
+  }
+
+  if (flags & ORIG_NAME) {
+    /* Skip over NUL-terminated file name */
+    while (len && *data) {
+      --len;
+      ++data;
+    }
+    if (!len || *data)
+      return GZIP_UNDERFLOW;
+
+    /* Skip over the NUL */
+    --len;
+    ++data;
+  }
+
+  if (flags & COMMENT) {
+    /* Skip over NUL-terminated comment */
+    while (len && *data) {
+      --len;
+      ++data;
+    }
+    if (!len || *data)
+      return GZIP_UNDERFLOW;
+
+    /* Skip over the NUL */
+    --len;
+    ++data;
+  }
+
+  if (flags & HEAD_CRC) {
+    if (len < 2)
+      return GZIP_UNDERFLOW;
+
+    len -= 2;
+    data += 2;
+  }
+
+  *headerlen = totallen - len;
+  return GZIP_OK;
+}
+
+CURLcode
+Curl_unencode_gzip_write(struct SessionHandle *data,
+                         struct Curl_transfer_keeper *k,
+                         ssize_t nread)
+{
+  int status;                   /* zlib status */
+  CURLcode result = CURLE_OK;   /* Curl_client_write status */
+  char decomp[DSIZ];            /* Put the decompressed data here. */
+  z_stream *z = &k->z;          /* zlib state structure */
+
+  /* Initialize zlib? */
+  if (!k->zlib_init) {
+    z->zalloc = (alloc_func)Z_NULL;
+    z->zfree = (free_func)Z_NULL;
+    z->opaque = 0;
+    z->next_in = NULL;
+    z->avail_in = 0;
+    if (inflateInit2(z, -MAX_WBITS) != Z_OK)
+      return process_zlib_error(data, z);
+    k->zlib_init = 1;   /* Initial call state */
+  }
+
+  /* This next mess is to get around the potential case where there isn't
+   * enough data passed in to skip over the gzip header.  If that happens, we
+   * malloc a block and copy what we have then wait for the next call.  If
+   * there still isn't enough (this is definitely a worst-case scenario), we
+   * make the block bigger, copy the next part in and keep waiting.
+   */
+
+  /* Skip over gzip header? */
+  if (k->zlib_init == 1) {
+    /* Initial call state */
+    ssize_t hlen;
+
+    switch (check_gzip_header((unsigned char *)k->str, nread, &hlen)) {
+    case GZIP_OK:
+      z->next_in = (Bytef *)k->str + hlen;
+      z->avail_in = (uInt)(nread - hlen);
+      k->zlib_init = 3; /* Inflating stream state */
+      break;
+
+    case GZIP_UNDERFLOW:
+      /* We need more data so we can find the end of the gzip header.  It's
+       * possible that the memory block we malloc here will never be freed if
+       * the transfer abruptly aborts after this point.  Since it's unlikely
+       * that circumstances will be right for this code path to be followed in
+       * the first place, and it's even more unlikely for a transfer to fail
+       * immediately afterwards, it should seldom be a problem.
+       */
+      z->avail_in = (uInt)nread;
+      z->next_in = malloc(z->avail_in);
+      if (z->next_in == NULL) {
+        return exit_zlib(z, &k->zlib_init, CURLE_OUT_OF_MEMORY);
+      }
+      memcpy(z->next_in, k->str, z->avail_in);
+      k->zlib_init = 2;   /* Need more gzip header data state */
+      /* We don't have any data to inflate yet */
+      return CURLE_OK;
+
+    case GZIP_BAD:
+    default:
+      return exit_zlib(z, &k->zlib_init, process_zlib_error(data, z));
+    }
+
+  }
+  else if (k->zlib_init == 2) {
+    /* Need more gzip header data state */
+    ssize_t hlen;
+    unsigned char *oldblock = z->next_in;
+
+    z->avail_in += nread;
+    z->next_in = realloc(z->next_in, z->avail_in);
+    if (z->next_in == NULL) {
+      free(oldblock);
+      return exit_zlib(z, &k->zlib_init, CURLE_OUT_OF_MEMORY);
+    }
+    /* Append the new block of data to the previous one */
+    memcpy(z->next_in + z->avail_in - nread, k->str, nread);
+
+    switch (check_gzip_header(z->next_in, z->avail_in, &hlen)) {
+    case GZIP_OK:
+      /* This is the zlib stream data */
+      free(z->next_in);
+      /* Don't point into the malloced block since we just freed it */
+      z->next_in = (Bytef *)k->str + hlen + nread - z->avail_in;
+      z->avail_in = (uInt)(z->avail_in - hlen);
+      k->zlib_init = 3;   /* Inflating stream state */
+      break;
+
+    case GZIP_UNDERFLOW:
+      /* We still don't have any data to inflate! */
+      return CURLE_OK;
+
+    case GZIP_BAD:
+    default:
+      free(z->next_in);
+      return exit_zlib(z, &k->zlib_init, process_zlib_error(data, z));
+    }
+
+  }
+  else {
+    /* Inflating stream state */
+    z->next_in = (Bytef *)k->str;
+    z->avail_in = (uInt)nread;
+  }
+
+  if (z->avail_in == 0) {
+    /* We don't have any data to inflate; wait until next time */
+    return CURLE_OK;
+  }
+
+  /* because the buffer size is fixed, iteratively decompress and transfer to
+     the client via client_write. */
+  for (;;) {
+    /* (re)set buffer for decompressed output for every iteration */
+    z->next_out = (Bytef *)&decomp[0];
+    z->avail_out = DSIZ;
+
+    status = inflate(z, Z_SYNC_FLUSH);
+    if (status == Z_OK || status == Z_STREAM_END) {
+      if(DSIZ - z->avail_out) {
+        result = Curl_client_write(data, CLIENTWRITE_BODY, decomp,
+                                   DSIZ - z->avail_out);
+        /* if !CURLE_OK, clean up, return */
+        if (result)
+          return exit_zlib(z, &k->zlib_init, result);
+      }
+
+      /* Done?; clean up, return */
+      /* We should really check the gzip CRC here */
+      if (status == Z_STREAM_END) {
+        if (inflateEnd(z) == Z_OK)
+          return exit_zlib(z, &k->zlib_init, result);
+        else
+          return exit_zlib(z, &k->zlib_init, process_zlib_error(data, z));
+      }
+
+      /* Done with these bytes, exit */
+      if (status == Z_OK && z->avail_in == 0 && z->avail_out > 0)
+        return result;
+    }
+    else {                      /* Error; exit loop, handle below */
+      return exit_zlib(z, &k->zlib_init, process_zlib_error(data, z));
+    }
+  }
+}
+#endif /* HAVE_LIBZ */