made util::url_encode refrain from encoding unreserved chars

as per rfc 3986

Signed-off-by: Michael Krelin <hacker@klever.net>

1 files changed, 33 insertions, 6 deletions

diff --git a/lib/util.cc b/lib/util.cc
index 29e6738..a6e08e2 100644
--- a/lib/util.cc
+++ b/lib/util.cc
@@ -10,7 +10,6 @@
 #include <openssl/evp.h>
 #include <openssl/sha.h>
 #include <openssl/hmac.h>
-#include <curl/curl.h>
 #include <opkele/util.h>
 #include <opkele/exception.h>
 #include <opkele/data.h>
@@ -156,12 +155,40 @@ namespace opkele {
          *
          */
 
+        static inline bool isrfc3986unreserved(int c) {
+            if(c<'-') return false;
+            if(c<='.') return true;
+            if(c<'0') return false; if(c<='9') return true;
+            if(c<'A') return false; if(c<='Z') return true;
+            if(c<'_') return false;
+            if(c=='_') return true;
+            if(c<'a') return false; if(c<='z') return true;
+            if(c=='~') return true;
+            return false;
+        }
+
+        struct __url_encoder : public unary_function<char,void> {
+            public:
+                string& rv;
+
+                __url_encoder(string& r) : rv(r) { }
+
+                result_type operator()(argument_type c) {
+                    if(isrfc3986unreserved(c))
+                        rv += c;
+                    else{
+                        char tmp[4];
+                        snprintf(tmp,sizeof(tmp),"%%%02X",
+                                (c&0xff));
+                        rv += tmp;
+                    }
+                }
+        };
+
         string url_encode(const string& str) {
-            char * t = curl_escape(str.c_str(),str.length());
-            if(!t)
-                throw failed_conversion(OPKELE_CP_ "failed to curl_escape()");
-            string rv(t);
-            curl_free(t);
+            string rv;
+            for_each(str.begin(),str.end(),
+                    __url_encoder(rv));
             return rv;
         }