move URL parsing / struct over into libcitadel

[citadel.git] / libcitadel / lib / urlhandling.c

diff --git a/libcitadel/lib/urlhandling.c b/libcitadel/lib/urlhandling.c
new file mode 100644 (file)
index 0000000..a8856fa
--- /dev/null
+++ b/libcitadel/lib/urlhandling.c
@@ -0,0 +1,111 @@
+#include "sysdep.h"
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdio.h>
+#include <sys/select.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include "libcitadel.h"
+
+/**
+ * @defgroup URLHandling ParsedURL object to handle connection data
+ */
+
+/**
+ * @ingroup URLHandling
+ * @brief frees a linked list of ParsedURL 
+ * @param Url (list) of ParsedURL to be freet; Pointer is NULL'ed for the caller.
+ */
+void FreeURL(ParsedURL** Url)
+{
+       if (*Url != NULL) {
+               FreeStrBuf(&(*Url)->URL);
+               if ((*Url)->Next != NULL)
+                       FreeURL(&(*Url)->Next);
+               free(*Url);
+               *Url = NULL;
+       }
+}
+
+/**
+ * @ingroup URLHandling
+ * @brief parses the string provided with UrlStr into *Url
+ * @param Url on success this contains the parsed object; needs to be free'd by caller.
+ * @param UrlStr String we should parse into parts
+ * @param DefaultPort Which is the default port here?
+ */
+int ParseURL(ParsedURL **Url, StrBuf *UrlStr, unsigned short DefaultPort)
+{
+       const char *pch, *pEndHost, *pPort, *pCredEnd, *pUserEnd;
+       ParsedURL *url = (ParsedURL *)malloc(sizeof(ParsedURL));
+       memset(url, 0, sizeof(ParsedURL));
+
+       url->af = AF_INET;
+       url->Port =  DefaultPort;
+       /*
+        * http://username:passvoid@[ipv6]:port/url 
+        */
+       url->URL = NewStrBufDup(UrlStr);
+       url->Host = pch = ChrPtr(url->URL);
+       url->LocalPart = strchr(pch, '/');
+       if (url->LocalPart != NULL) {
+               if ((*(url->LocalPart + 1) == '/') && 
+                   (*(url->LocalPart + 2) == ':')) { /* TODO: find default port for this protocol... */
+                       url->Host = url->LocalPart + 3;
+                       url->LocalPart = strchr(url->Host, '/');
+               }
+       }
+       if (url->LocalPart == NULL) {
+               url->LocalPart = pch + StrLength(url->URL);
+       }
+
+       pCredEnd = strchr(pch, '@');
+       if (pCredEnd >= url->LocalPart)
+               pCredEnd = NULL;
+       if (pCredEnd != NULL)
+       {
+               url->User = url->Host;
+               url->Host = pCredEnd + 1;
+               pUserEnd = strchr(url->User, ':');
+               
+               if (pUserEnd > pCredEnd)
+                       pUserEnd = pCredEnd;
+               else {
+                       url->Pass = pUserEnd + 1;
+               }
+               StrBufPeek(url->URL, pUserEnd, 0, '\0');
+               StrBufPeek(url->URL, pCredEnd, 0, '\0');                
+       }
+       
+       pPort = NULL;
+       if (*url->Host == '[') {
+               url->Host ++;
+               pEndHost = strchr(url->Host, ']');
+               if (pEndHost == NULL) {
+                       FreeStrBuf(&url->URL);
+                       free(url);
+                       return 0; /* invalid syntax, no ipv6 */
+               }
+               StrBufPeek(url->URL, pEndHost, 0, '\0');
+               if (*(pEndHost + 1) == ':'){
+                       StrBufPeek(url->URL, pEndHost + 1, 0, '\0');
+                       pPort = pEndHost + 2;
+               }
+               url->af = AF_INET6;
+       }
+       else {
+               pPort = strchr(url->Host, ':');
+               if (pPort != NULL) {
+                       StrBufPeek(url->URL, pPort, 0, '\0');
+                       pPort ++;
+               }
+       }
+       if (pPort != NULL)
+               url->Port = atol(pPort);
+       url->IsIP = inet_pton(url->af, url->Host, &url->Addr);
+       *Url = url;
+       return 1;
+}