Backend

2019-02-19 22:35:27 +00:00
parent ae5dbd1e80
commit cc33879fd0
264 changed files with 214146 additions and 0 deletions
@@ -0,0 +1,135 @@
+#include <stdio.h>
+#include <string.h>
+#include <regex.h>
+
+#include "safestring.h"
+#include "util.h"
+#include "clog.h"
+
+bool reg_match( const char * input, const char * regexp, char * ret, int sz, int * pos /*= NULL*/ )
+{
+        regex_t compiled;
+        regmatch_t match[2];
+
+        bool satisfied = false;
+        if ( ret ) ret[0] = 0;
+
+//      logfmt( FLOG_MAX,  "Matching '%s' against '%s'", input, regexp );
+
+        if ( regcomp( &compiled, regexp, REG_EXTENDED ) != 0 )
+        {
+                logfmt( logWARNING, "regcomp returned non-0, assuming a match" );
+        }
+        else
+        {
+                size_t r = regexec( &compiled, input, 2, match, 0 );
+
+                if ( r==0 )     // match
+                {
+                    if ( pos )
+                        *pos = match[1].rm_so;
+
+                    int len = match[1].rm_eo-match[1].rm_so;
+
+                 if ( ret )
+                        strnsafecpy( ret, &input[ match[1].rm_so ],  len, sz );
+
+                    satisfied = true;
+                }
+                else
+                    satisfied = false;
+
+                regfree( &compiled );
+        }
+        return satisfied;
+}
+
+
+char * urlencode( const char * buf, char * text, int sz )
+{
+// old  char url[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ^_\\-0123456789.";    // .  ???
+        char url[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789$-_.!*'(),";        // $-_.+!*'(),  took '+' out
+        int len = strlen(buf);
+//      fprintf(flog, "buf: '%s', len: %d\n", buf, len); fflush(flog);
+        text[0] = 0;
+        for (int i=0; i<len; i++)
+        {
+                int len = strlen(text);
+
+                if (strchr(url, buf[i]))
+                        snprintf(&text[len], sz-len, "%c", buf[i]);
+                else
+                        snprintf(&text[len], sz-len, "%%%02x", (unsigned char)buf[i]);
+//              fprintf(flog, "%d\n", i); fflush(flog);
+        }
+//      strcpy(buf, text);
+//      Log(text, "Returning:");
+        return text;
+}
+
+
+/*
+char * urlencode(const char * buf)
+{
+        return urlencode( buf, text, sizeof(text) );
+}
+*/
+
+char * urldecode( char * buf, char * text, int sz)
+{
+//      Log(buf, "urldecode()");
+    unsigned int c3;
+    char * c2; c2 = buf;
+    unsigned int ch;
+    char * value=text;
+//    int valuelen = sz;
+
+    value[0] = 0;
+    //bool EOS = false;
+
+    while (c2)
+    {
+                c3 = strcspn(c2, "%+");  // "%+"
+                if (c3==strlen(c2))
+                {
+//                      strncpy_(&value[strlen(value)], c2, Min0(c3, valuelen-strlen(value)-1, EOS) );
+                        strsafecat( value, c2, sz );
+                        break; //over
+                }
+
+//              strncpy_(&value[strlen(value)], c2, Min0(c3, valuelen-strlen(value)-1, EOS) );
+                strnsafecat( value, c2, c3, sz );
+
+        //      Log(value);
+//              if (EOS) break;
+
+
+                // '+' is actually an allowed symbol per http://www.rfc-editor.org/rfc/rfc1738.txt
+                // but browser rules say space is encoded as '+'
+                //      http://www.speakeasy.org/~cgires/readdata/
+
+                if (*(c2+c3)=='+')
+                {
+//                      strncpy_(&value[strlen(value)], " ", Min0(1, valuelen-strlen(value)-1, EOS) );
+                        strsafecat( value, " ", sz );
+//                      if (EOS) break;
+                        c2+=c3+1;
+                }
+                else
+                {
+                        sscanf(c2+c3+1, "%2x", &ch);
+                        strcatf( value, sz, "%c", ch);
+
+//                      if (strlen(value)>=valuelen-1)
+//                              { EOS = TRUE; break; }
+
+                        c2+=c3+3;
+                 }
+    }
+
+        value[sz-1] = 0;
+
+//      Log(text, "urldecode returning");
+    return text;
+}
+