In an attempt to repeat the problem in bug report #1850730

(http://curl.haxx.se/bug/view.cgi?id=1850730) I wrote up test case 552. The
test is doing a 70K POST with a read callback and an ioctl callback over a
proxy requiring Digest auth. The test case code is more or less identical to
the test recipe code provided by Spacen Jasset (who submitted the bug report).

CHANGES

@@ -6,6 +6,14 @@
 
                                   Changelog
 
+Daniel S (26 Dec 2007)
+- In an attempt to repeat the problem in bug report #1850730
+  (http://curl.haxx.se/bug/view.cgi?id=1850730) I wrote up test case 552. The
+  test is doing a 70K POST with a read callback and an ioctl callback over a
+  proxy requiring Digest auth. The test case code is more or less identical to
+  the test recipe code provided by Spacen Jasset (who submitted the bug
+  report).
+
 Daniel S (25 Dec 2007)
 - Gary Maxwell filed bug report #1856628
   (http://curl.haxx.se/bug/view.cgi?id=1856628) and provided a fix for the

tests/data/Makefile.am

@@ -47,7 +47,7 @@ EXTRA_DIST = test1 test108 test117 test127 test20 test27 test34 test46	   \
  test615 test1007 test541 test1010 test1011 test1012 test542 test543       \
  test536 test1008 test1009 test2000 test2001 test2002 test2003 test35      \
  test544 test545 test2004 test546 test1013 test1014 test1015 \
- test547 test548 test549 test550 test551
+ test547 test548 test549 test550 test551 test552
 
 filecheck:
 	@mkdir test-place; \

tests/libtest/Makefile.am

@@ -48,7 +48,7 @@ noinst_PROGRAMS = lib500 lib501 lib502 lib503 lib504 lib505 lib506	\
   lib507 lib508 lib509 lib510 lib511 lib512 lib513 lib514 lib515 lib516	\
   lib517 lib518 lib519 lib520 lib521 lib523 lib524 lib525 lib526 lib527	\
   lib529 lib530 lib532 lib533 lib536 lib537 lib540 lib541 lib542 lib543 \
-  lib544 lib545 lib547 lib548 lib549
+  lib544 lib545 lib547 lib548 lib549 lib552
 
 # Dependencies (may need to be overriden)
 LDADD = $(LIBDIR)/libcurl.la
@@ -146,3 +146,4 @@ lib548_CFLAGS = -DLIB548
 
 lib549_SOURCES = lib549.c $(SUPPORTFILES)
 
+lib552_SOURCES = lib552.c $(SUPPORTFILES)

tests/libtest/lib552.c

+/*****************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * $Id$
+ *
+ * argv1 = URL
+ * argv2 = proxy with embedded user+password
+ */
+
+#include "test.h"
+
+struct data {
+  char trace_ascii; /* 1 or 0 */
+};
+
+static
+void dump(const char *text,
+          FILE *stream, unsigned char *ptr, size_t size,
+          char nohex)
+{
+  size_t i;
+  size_t c;
+
+  unsigned int width=0x10;
+
+  if(nohex)
+    /* without the hex output, we can fit more on screen */
+    width = 0x40;
+
+  fprintf(stream, "%s, %d bytes (0x%x)\n", text, (int)size, (int)size);
+
+  for(i=0; i<size; i+= width) {
+
+    fprintf(stream, "%04x: ", (int)i);
+
+    if(!nohex) {
+      /* hex not disabled, show it */
+      for(c = 0; c < width; c++)
+        if(i+c < size)
+          fprintf(stream, "%02x ", ptr[i+c]);
+        else
+          fputs("   ", stream);
+    }
+
+    for(c = 0; (c < width) && (i+c < size); c++) {
+      /* check for 0D0A; if found, skip past and start a new line of output */
+      if (nohex && (i+c+1 < size) && ptr[i+c]==0x0D && ptr[i+c+1]==0x0A) {
+        i+=(c+2-width);
+        break;
+      }
+      fprintf(stream, "%c",
+              (ptr[i+c]>=0x20) && (ptr[i+c]<0x80)?ptr[i+c]:'.');
+      /* check again for 0D0A, to avoid an extra \n if it's at width */
+      if (nohex && (i+c+2 < size) && ptr[i+c+1]==0x0D && ptr[i+c+2]==0x0A) {
+        i+=(c+3-width);
+        break;
+      }
+    }
+    fputc('\n', stream); /* newline */
+  }
+  fflush(stream);
+}
+
+static
+int my_trace(CURL *handle, curl_infotype type,
+             unsigned char *data, size_t size,
+             void *userp)
+{
+  struct data *config = (struct data *)userp;
+  const char *text;
+  (void)handle; /* prevent compiler warning */
+
+  switch (type) {
+  case CURLINFO_TEXT:
+    fprintf(stderr, "== Info: %s", data);
+  default: /* in case a new one is introduced to shock us */
+    return 0;
+
+  case CURLINFO_HEADER_OUT:
+    text = "=> Send header";
+    break;
+  case CURLINFO_DATA_OUT:
+    text = "=> Send data";
+    break;
+  case CURLINFO_SSL_DATA_OUT:
+    text = "=> Send SSL data";
+    break;
+  case CURLINFO_HEADER_IN:
+    text = "<= Recv header";
+    break;
+  case CURLINFO_DATA_IN:
+    text = "<= Recv data";
+    break;
+  case CURLINFO_SSL_DATA_IN:
+    text = "<= Recv SSL data";
+    break;
+  }
+
+  dump(text, stderr, data, size, config->trace_ascii);
+  return 0;
+}
+
+
+static size_t current_offset = 0;
+char data[70000]; /* MUST  be more than 64k OR MAX_INITIAL_POST_SIZE */
+
+static size_t read_callback(void *ptr, size_t size, size_t nmemb, void *stream)
+{
+  size_t  amount = nmemb * size; /* Total bytes curl wants */
+  size_t  available = sizeof data - current_offset;  /* What we have to give */
+  size_t  given = amount < available ? amount : available; /* What is given */
+  (void)stream;
+  memcpy(ptr, data + current_offset, given);
+  current_offset += given;
+  return given;
+}
+
+
+static size_t write_callback(void *ptr, size_t size, size_t nmemb, void *stream)
+{
+  printf("%.*s", size * nmemb, (char *)ptr);
+  (void)stream;
+  return size * nmemb;
+}
+
+
+static curlioerr ioctl_callback(CURL * handle, int cmd, void *clientp)
+{
+  (void)clientp;
+  if (cmd == CURLIOCMD_RESTARTREAD ) {
+    printf("APPLICATION: recieved a CURLIOCMD_RESTARTREAD request\n");
+    printf("APPLICATION: ** REWINDING! **\n");
+    current_offset = 0;
+    return CURLIOE_OK;
+  }
+  (void)handle;
+  return CURLIOE_UNKNOWNCMD;
+}
+
+
+
+int test(char *URL)
+{
+  CURL *curl;
+  CURLcode res;
+  struct data config;
+  size_t i;
+  char fill[] = "test data";
+
+  config.trace_ascii = 1; /* enable ascii tracing */
+
+  curl = curl_easy_init();
+  if(curl) {
+    curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, my_trace);
+    curl_easy_setopt(curl, CURLOPT_DEBUGDATA, &config);
+    /* the DEBUGFUNCTION has no effect until we enable VERBOSE */
+    curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
+
+    /* setup repeated data string */
+    for (i=0; i < sizeof data; ++i)
+        data[i] = fill[i % sizeof fill];
+
+    /* Post */
+    curl_easy_setopt(curl, CURLOPT_POST, 1);
+
+    /* Setup read callback */
+    curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, sizeof data);
+    curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback);
+
+    /* Write callback */
+    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);
+
+    /* Ioctl function */
+    curl_easy_setopt(curl, CURLOPT_IOCTLFUNCTION, ioctl_callback);
+
+    curl_easy_setopt(curl, CURLOPT_PROXY, libtest_arg2);
+
+    curl_easy_setopt(curl, CURLOPT_URL, URL);
+
+    /* Accept any auth. But for this bug configure proxy with DIGEST, basic might work too, not NTLM */
+    curl_easy_setopt(curl, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
+
+    res = curl_easy_perform(curl);
+    fprintf(stderr, "curl_east_perform = %d\n", res);
+
+    /* always cleanup */
+    curl_easy_cleanup(curl);
+  }
+  return 0;
+}