From: Adam Dickmeiss <adam@indexdata.dk>
Date: Fri, 10 Jan 2014 12:58:36 +0000 (+0100)
Subject: Add yaz_check_location
X-Git-Tag: v5.0.11~9
X-Git-Url: http://git.indexdata.com/?p=yaz-moved-to-github.git;a=commitdiff_plain;h=d606d0d7c6015414a1d5ba065d09b507679be5a3

Add yaz_check_location

This function gets an absolute URI from Location (HTTP redirect).
---

diff --git a/include/yaz/zgdu.h b/include/yaz/zgdu.h
index a92a3b1..3c2ad75 100644
--- a/include/yaz/zgdu.h
+++ b/include/yaz/zgdu.h
@@ -110,6 +110,8 @@ YAZ_EXPORT int yaz_decode_http_response(ODR o, Z_HTTP_Response **hr_p);
 YAZ_EXPORT int yaz_encode_http_response(ODR o, Z_HTTP_Response *hr);
 YAZ_EXPORT int yaz_encode_http_request(ODR o, Z_HTTP_Request *hr);
 
+YAZ_EXPORT const char *yaz_check_location(ODR odr, const char *uri,
+                                    const char *location, int *host_change);
 YAZ_END_CDECL
 
 #endif
diff --git a/src/http.c b/src/http.c
index d79fd10..0f17df5 100644
--- a/src/http.c
+++ b/src/http.c
@@ -16,6 +16,7 @@
 #include <yaz/matchstr.h>
 #include <yaz/zgdu.h>
 #include <yaz/base64.h>
+#include <yaz/comstack.h>
 
 static int decode_headers_content(ODR o, int off, Z_HTTP_Header **headers,
                                   char **content_buf, int *content_len)
@@ -645,6 +646,32 @@ int yaz_encode_http_request(ODR o, Z_HTTP_Request *hr)
     return 1;
 }
 
+const char *yaz_check_location(ODR odr, const char *uri, const char *location,
+                               int *host_change)
+{
+    if (*location == '/')
+    {  /* relative location */
+        char *args = 0;
+        char *nlocation = (char *) odr_malloc(odr, strlen(location)
+                                              + strlen(uri) + 3);
+        strcpy(nlocation, uri);
+        cs_get_host_args(nlocation, (const char **) &args);
+        if (!args || !*args)
+            args = nlocation + strlen(nlocation);
+        else
+            args--;
+        strcpy(args, location);
+        *host_change = 0;
+        return nlocation;
+    }
+    else
+    {
+        /* we don't check if host is the same as before - yet */
+        *host_change = 1;
+        return location;
+    }
+}
+
 /*
  * Local variables:
  * c-basic-offset: 4