-J: support ';' in quoted file names

Content-disposition headers can provide file names with semicolons which
previously would be cut off at that point.

Added test case 1311 and 1312 to verify -J.

Bug: http://curl.haxx.se/bug/view.cgi?id=3375603
Reported by: Peter Hjalmarsson

src/main.c

@@ -481,6 +481,7 @@ typedef enum {
 
 struct OutStruct {
   char *filename;
+  bool alloc_filename;
   FILE *stream;
   struct Configurable *config;
   curl_off_t bytes; /* amount written so far */
@@ -4457,6 +4458,9 @@ static char *get_url_file_name(const char *url)
   return fn;
 }
 
+/*
+ * Copies a file name part and returns an ALLOCATED data buffer.
+ */
 static char*
 parse_filename(char *ptr, size_t len)
 {
@@ -4525,6 +4529,26 @@ parse_filename(char *ptr, size_t len)
   if(copy!=p)
     memmove(copy, p, strlen(p)+1);
 
+  /* in case we built curl debug enabled, we allow an evironment variable
+   * named CURL_TESTDIR to prefix the given file name to put it into a
+   * specific directory
+   */
+#ifdef CURLDEBUG
+  {
+    char *tdir = curlx_getenv("CURL_TESTDIR");
+    if(tdir) {
+      char buffer[512]; /* suitably large */
+      snprintf(buffer, sizeof(buffer), "%s/%s", tdir, copy);
+      free(copy);
+      copy = strdup(buffer); /* clone the buffer, we don't use the libcurl
+                                aprintf() or similar since we want to use the
+                                same memory code as the "real" parse_filename
+                                function */
+      curl_free(tdir);
+    }
+  }
+#endif
+
   return copy;
 }
 
@@ -4544,7 +4568,8 @@ header_callback(void *ptr, size_t size, size_t nmemb, void *stream)
        (encoded filenames (*=) are not supported) */
     for(;;) {
       char *filename;
-      char *semi;
+      char *eol; /* end of line, we can't easily search for the end of the
+                    file name due to it sometimes being quoted or not */
 
       while(*p && (p < end) && !ISALPHA(*p))
         p++;
@@ -4558,15 +4583,16 @@ header_callback(void *ptr, size_t size, size_t nmemb, void *stream)
         continue;
       }
       p+=9;
-      semi = strchr(p, ';');
+      eol = strchr(p, '\n');
 
       /* this expression below typecasts 'cb' only to avoid
          warning: signed and unsigned type in conditional expression
       */
-      len = semi ? (semi - p) : (ssize_t)cb - (p - str);
+      len = eol ? (eol - p) : (ssize_t)cb - (p - str);
       filename = parse_filename(p, len);
       if(filename) {
         outs->filename = filename;
+        outs->alloc_filename = TRUE;
         break;
       }
     }
@@ -4838,6 +4864,7 @@ operate(struct Configurable *config, int argc, argv_item_t argv[])
     /* open file for output: */
     if(strcmp(config->headerfile,"-")) {
       heads.filename = config->headerfile;
+      heads.alloc_filename = FALSE;
     }
     else
       heads.stream=stdout;
@@ -5008,6 +5035,7 @@ operate(struct Configurable *config, int argc, argv_item_t argv[])
           }
 
           outs.filename = outfile;
+          outs.alloc_filename = FALSE;
 
           if(config->resume_from) {
             outs.init = config->resume_from;
@@ -5752,6 +5780,8 @@ operate(struct Configurable *config, int argc, argv_item_t argv[])
               warnf(config, "Error setting extended attributes: %s\n",
                     strerror(errno) );
           }
+          if(outs.alloc_filename)
+            free(outs.filename);
 
           rc = fclose(outs.stream);
           if(!res && rc) {

tests/data/Makefile.am

@@ -73,7 +73,7 @@ test1110 test1111 test1112 test1113 test1114 test1115 test1116 test1117	\
 test1118 test1119 test1120 test1121 test1122 test1123 test1124 test1125	\
 test1126 test1127 test1128 test1129 test1130 test1131 test1200 test1201	\
 test1202 test1203 test1300 test1301 test1302 test1303 test1304 test1305	\
-test1306 test1307 test1308 test1309 test1310 \
+test1306 test1307 test1308 test1309 test1310 test1311 test1312 \
 test2000 test2001 test2002 test2003 test2004
 
 EXTRA_DIST = $(TESTCASES) DISABLED

tests/data/test1311

@@ -0,0 +1,64 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+HTTP GET
+-J
+</keywords>
+</info>
+
+#
+<reply>
+<data nocheck="yes">
+HTTP/1.1 200 OK
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 6
+Connection: close
+Content-Type: text/html
+Content-Disposition: filename=name1311; charset=funny; option=strange
+
+12345
+</data>
+</reply>
+
+#
+# Client-side
+<client>
+# this relies on the debug feature to allow us to set directory to store the
+# -J output in
+<features>
+debug
+</features>
+<server>
+http
+</server>
+<name>
+HTTP GET with -J and Content-Disposition
+</name>
+<setenv>
+CURL_TESTDIR=%PWD/log
+</setenv>
+<command option="no-output,no-include">
+http://%HOSTIP:%HTTPPORT/1311 -J -O
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<strip>
+^User-Agent:.*
+</strip>
+<protocol>
+GET /1311 HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+Accept: */*
+
+</protocol>
+<file name="log/name1311">
+12345
+</file>
+
+</verify>
+</testcase>

tests/data/test1312

@@ -0,0 +1,64 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+HTTP GET
+-J
+</keywords>
+</info>
+
+#
+<reply>
+<data nocheck="yes">
+HTTP/1.1 200 OK
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 6
+Connection: close
+Content-Type: text/html
+Content-Disposition: inline; filename="name1312;weird"
+
+12345
+</data>
+</reply>
+
+#
+# Client-side
+<client>
+# this relies on the debug feature to allow us to set directory to store the
+# -J output in
+<features>
+debug
+</features>
+<server>
+http
+</server>
+<name>
+HTTP GET with -J, Content-Disposition and ; in filename
+</name>
+<setenv>
+CURL_TESTDIR=%PWD/log
+</setenv>
+<command option="no-output,no-include">
+http://%HOSTIP:%HTTPPORT/1312 -J -O
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<strip>
+^User-Agent:.*
+</strip>
+<protocol>
+GET /1312 HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+Accept: */*
+
+</protocol>
+<file name="log/name1312;weird">
+12345
+</file>
+
+</verify>
+</testcase>