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authorMichael Krelin <hacker@klever.net>2008-03-02 23:52:14 (UTC)
committer Michael Krelin <hacker@klever.net>2008-03-02 23:52:14 (UTC)
commit5fd5ecad8c2bd1e8846c11fa9b281f0f4ab8a4a7 (patch) (side-by-side diff)
tree76ba24c589d0ce7de6cab113787cf7a70572f994
parentf6482fb9003e4953f838ba4ef2c110190355622f (diff)
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aded util::url_decode()
Signed-off-by: Michael Krelin <hacker@klever.net>
Diffstat (more/less context) (ignore whitespace changes)
-rw-r--r--include/opkele/util.h10
-rw-r--r--lib/util.cc28
2 files changed, 37 insertions, 1 deletions
diff --git a/include/opkele/util.h b/include/opkele/util.h
index fd974a1..0130bff 100644
--- a/include/opkele/util.h
+++ b/include/opkele/util.h
@@ -31,7 +31,7 @@ namespace opkele {
time_t w3c_to_time(const string& w);
/**
- * Encode string to the representation suitable for using in URL.
+ * Encode string to the representation suitable for using in URL
* @param str string to encode
* @return encoded string
* @throw failed_conversion in case of failure
@@ -39,6 +39,14 @@ namespace opkele {
string url_encode(const string& str);
/**
+ * Decode url-encoded string back to normal
+ * @param str url-encoded string
+ * @return decoded string
+ * @throw failed_conversion in case of failure
+ */
+ string url_decode(const string& str);
+
+ /**
* Make string suitable for using as x(ht)ml attribute.
* @param str string to escape
* @return escaped string
diff --git a/lib/util.cc b/lib/util.cc
index a6e08e2..3e7f3aa 100644
--- a/lib/util.cc
+++ b/lib/util.cc
@@ -192,6 +192,34 @@ namespace opkele {
return rv;
}
+ string url_decode(const string& str) {
+ string rv;
+ back_insert_iterator<string> ii(rv);
+ for(string::const_iterator i=str.begin(),ie=str.end();
+ i!=ie;++i) {
+ switch(*i) {
+ case '+':
+ *(ii++) = ' '; break;
+ case '%':
+ ++i;
+ static char tmp[3] = {0,0,0};
+ if(i==ie)
+ throw failed_conversion(OPKELE_CP_ "trailing percent in the url-encoded string");
+ tmp[0] == *(i++);
+ if(i==ie)
+ throw failed_conversion(OPKELE_CP_ "not enough hexadecimals after the percent sign in url-encoded string");
+ tmp[1] == *i;
+ if(!(isxdigit(tmp[0]) && isxdigit(tmp[1])))
+ throw failed_conversion(OPKELE_CP_ "non-hex follows percent in url-encoded string");
+ *(ii++) = strtol(tmp,0,16);
+ break;
+ default:
+ *(ii++) = *i; break;
+ }
+ }
+ return rv;
+ }
+
string attr_escape(const string& str) {
static const char *unsafechars = "<>&\n\"'";
string rv;