- Bug report #1025986. When following a Location: with a custom Host: header

replacement, curl only replaced the Host: header on the initial request and didn't replace it on the following ones. This resulted in requests with two Host: headers. Now, curl checks if the location is on the same host as the initial request and then continues to replace the Host: header. And when it moves to another host, it doesn't replace the Host: header but it also doesn't make the second Host: header get used in the request. This change is verified by the two new test cases 184 and 185.
2024-12-21 15:48:49 -05:00 · 2004-09-10 20:58:51 +00:00 · 2004-09-10 20:58:51 +00:00 · b8b56248bd
commit b8b56248bd
parent 33929117f9
7 changed files with 177 additions and 19 deletions
--- a/13
+++ b/13
@ -6,6 +6,19 @@

                                  Changelog

+Daniel (10 September 2004)
+- Bug report #1025986. When following a Location: with a custom Host: header
+  replacement, curl only replaced the Host: header on the initial request
+  and didn't replace it on the following ones. This resulted in requests with
+  two Host: headers.
+
+  Now, curl checks if the location is on the same host as the initial request
+  and then continues to replace the Host: header. And when it moves to another
+  host, it doesn't replace the Host: header but it also doesn't make the
+  second Host: header get used in the request.
+
+  This change is verified by the two new test cases 184 and 185.
+
 Daniel (31 August 2004)
 - David Tarendash fount out that curl_multi_add_handle() returned
  CURLM_CALL_MULTI_PERFORM instead of CURLM_OK.
--- a/lib/http.c
+++ b/lib/http.c
@ -299,8 +299,8 @@ Curl_http_output_auth(struct connectdata *conn,
  /* To prevent the user+password to get sent to other than the original
     host due to a location-follow, we do some weirdo checks here */
  if(!data->state.this_is_a_follow ||
-     !data->state.auth_host ||
-     curl_strequal(data->state.auth_host, conn->host.name) ||
+     !data->state.first_host ||
+     curl_strequal(data->state.first_host, conn->host.name) ||
     data->set.http_disable_hostname_check_before_authentication) {

    /* Send proxy authentication header if needed */
@ -1156,14 +1156,13 @@ CURLcode Curl_http_connect(struct connectdata *conn)
      return result;
  }

-  if(conn->bits.user_passwd && !data->state.this_is_a_follow) {
-    /* Authorization: is requested, this is not a followed location, get the
-       original host name */
-    if (data->state.auth_host)
+  if(!data->state.this_is_a_follow) {
+    /* this is not a followed location, get the original host name */
+    if (data->state.first_host)
      /* Free to avoid leaking memory on multiple requests*/
-      free(data->state.auth_host);
+      free(data->state.first_host);

-    data->state.auth_host = strdup(conn->host.name);
+    data->state.first_host = strdup(conn->host.name);
  }

  return CURLE_OK;
@ -1363,11 +1362,13 @@ CURLcode Curl_http(struct connectdata *conn)
  Curl_safefree(conn->allocptr.host);

  ptr = checkheaders(data, "Host:");
-  if(ptr && !data->state.this_is_a_follow) {
+  if(ptr && (!data->state.this_is_a_follow ||
+             curl_strequal(data->state.first_host, conn->host.name))) {
    /* If we have a given custom Host: header, we extract the host name in
       order to possibly use it for cookie reasons later on. We only allow the
       custom Host: header if this is NOT a redirect, as setting Host: in the
-       redirected request is being out on thin ice. */
+       redirected request is being out on thin ice. Except if the host name
+       is the same as the first one! */
    char *start = ptr+strlen("Host:");
    while(*start && isspace((int)*start ))
      start++;
@ -1379,6 +1380,7 @@ CURLcode Curl_http(struct connectdata *conn)

    if(ptr != start) {
      size_t len=ptr-start;
+      Curl_safefree(conn->allocptr.cookiehost);
      conn->allocptr.cookiehost = malloc(len+1);
      if(!conn->allocptr.cookiehost)
        return CURLE_OUT_OF_MEMORY;
@ -1727,9 +1729,17 @@ CURLcode Curl_http(struct connectdata *conn)
        if(*ptr) {
          /* only send this if the contents was non-blank */

-          result = add_bufferf(req_buffer, "%s\r\n", headers->data);
-          if(result)
-            return result;
+          if(conn->allocptr.host &&
+            /* a Host: header was sent already, don't pass on any custom Host:
+               header as that will produce *two* in the same request! */
+             curl_strnequal("Host:", headers->data, 5))
+            ;
+          else {
+
+            result = add_bufferf(req_buffer, "%s\r\n", headers->data);
+            if(result)
+              return result;
+          }
        }
      }
      headers = headers->next;
--- a/lib/url.c
+++ b/lib/url.c
@ -211,7 +211,7 @@ CURLcode Curl_close(struct SessionHandle *data)
  if(data->change.cookielist) /* clean up list if any */
    curl_slist_free_all(data->change.cookielist);

-  Curl_safefree(data->state.auth_host);
+  Curl_safefree(data->state.first_host);
  Curl_safefree(data->state.scratch);

  if(data->change.proxy_alloc)
--- a/lib/urldata.h
+++ b/lib/urldata.h
@ -720,10 +720,10 @@ struct UrlState {
                                bytes / second */
  bool this_is_a_follow; /* this is a followed Location: request */

-  char *auth_host; /* if set, this should be the host name that we will
-                      sent authorization to, no else. Used to make Location:
-                      following not keep sending user+password... This is
-                      strdup() data.
+  char *first_host; /* if set, this should be the host name that we will
+                       sent authorization to, no else. Used to make Location:
+                       following not keep sending user+password... This is
+                       strdup() data.
                    */

  struct curl_ssl_session *session; /* array of 'numsessions' size */
--- a/tests/data/Makefile.am
+++ b/tests/data/Makefile.am
@ -25,7 +25,8 @@ EXTRA_DIST = test1 test108 test117 test127 test20 test27 test34 test46	\
 test158 test159 test511 test160 test161 test162 test163 test164	\
 test512 test165 test166 test167 test168 test169 test170 test171	\
 test172 test204 test205 test173 test174 test175 test176 test177	\
- test513 test514 test178 test179 test180 test181 test182 test183
+ test513 test514 test178 test179 test180 test181 test182 test183	\
+ test184 test185

 # The following tests have been removed from the dist since they no longer
 # work. We need to fix the test suite's FTPS server first, then bring them
--- a/tests/data/test184
+++ b/tests/data/test184
@ -0,0 +1,67 @@
+# Server-side
+<reply>
+<data>
+HTTP/1.1 301 OK swsbounce
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Content-Length: 4
+Location: http://yet.another.host/184
+
+moo
+</data>
+<data1>
+HTTP/1.1 200 OK
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Content-Length: 4
+
+moo
+</data1>
+<datacheck>
+HTTP/1.1 301 OK swsbounce
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Content-Length: 4
+Location: http://yet.another.host/184
+
+HTTP/1.1 200 OK
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Content-Length: 4
+
+moo
+</datacheck>
+</reply>
+
+# Client-side
+<client>
+<server>
+http
+</server>
+<features>
+SSL
+</features>
+ <name>
+HTTP replace Host: when following Location: to new host
+ </name>
+ <command>
+http://deathstar.another.galaxy/184 -L -H "Host: another.visitor.stay.a.while.stay.foreeeeeever" --proxy http://%HOSTIP:%HTTPPORT
+</command>
+</test>
+
+# Verify data after the test has been "shot"
+<verify>
+<strip>
+^User-Agent: curl/.*
+</strip>
+<protocol>
+GET http://deathstar.another.galaxy/184 HTTP/1.1
+User-Agent: curl/7.12.2-CVS (i686-pc-linux-gnu) libcurl/7.12.2-CVS OpenSSL/0.9.6b zlib/1.1.4 libidn/0.4.6
+Pragma: no-cache
+Accept: */*
+Host: another.visitor.stay.a.while.stay.foreeeeeever
+
+GET http://yet.another.host/184 HTTP/1.1
+Host: yet.another.host
+Pragma: no-cache
+Accept: */*
+
+</protocol>
+
+</verify>
--- a/tests/data/test185
+++ b/tests/data/test185
@ -0,0 +1,67 @@
+# Server-side
+<reply>
+<data>
+HTTP/1.1 301 OK swsbounce
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Content-Length: 4
+Location: go/west/185
+
+moo
+</data>
+<data1>
+HTTP/1.1 200 OK
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Content-Length: 4
+
+moo
+</data1>
+<datacheck>
+HTTP/1.1 301 OK swsbounce
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Content-Length: 4
+Location: go/west/185
+
+HTTP/1.1 200 OK
+Date: Thu, 09 Nov 2010 14:49:00 GMT
+Content-Length: 4
+
+moo
+</datacheck>
+</reply>
+
+# Client-side
+<client>
+<server>
+http
+</server>
+<features>
+SSL
+</features>
+ <name>
+HTTP replace Host: when following Location: on the same host
+ </name>
+ <command>
+http://deathstar.another.galaxy/185 -L -H "Host: another.visitor.stay.a.while.stay.foreeeeeever" --proxy http://%HOSTIP:%HTTPPORT
+</command>
+</test>
+
+# Verify data after the test has been "shot"
+<verify>
+<strip>
+^User-Agent: curl/.*
+</strip>
+<protocol>
+GET http://deathstar.another.galaxy/185 HTTP/1.1
+User-Agent: curl/7.12.2-CVS (i686-pc-linux-gnu) libcurl/7.12.2-CVS OpenSSL/0.9.6b zlib/1.1.4 libidn/0.4.6
+Pragma: no-cache
+Accept: */*
+Host: another.visitor.stay.a.while.stay.foreeeeeever
+
+GET http://deathstar.another.galaxy/go/west/185 HTTP/1.1
+Pragma: no-cache
+Accept: */*
+Host: another.visitor.stay.a.while.stay.foreeeeeever
+
+</protocol>
+
+</verify>