1 files changed, 64 insertions, 0 deletions
diff --git a/html.c b/html.c
index 0962e71..98ffaf9 100644
--- a/html.c
+++ b/html.c
@@ -1,187 +1,251 @@
 /* html.c: helper functions for html output
 *
 * Copyright (C) 2006 Lars Hjemli
 *
 * Licensed under GNU General Public License v2
 *   (see COPYING for full license text)
 */
 #include <unistd.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdarg.h>
 #include <string.h>
 int htmlfd = STDOUT_FILENO;
 char *fmt(const char *format, ...)
 {
        static char buf[8][1024];
        static int bufidx;
        int len;
        va_list args;
        bufidx++;
        bufidx &= 7;
        va_start(args, format);
        len = vsnprintf(buf[bufidx], sizeof(buf[bufidx]), format, args);
        va_end(args);
        if (len>sizeof(buf[bufidx])) {
                fprintf(stderr, "[html.c] string truncated: %s\n", format);
                exit(1);
        }
        return buf[bufidx];
 }
 void html(const char *txt)
 {
        write(htmlfd, txt, strlen(txt));
 }
 void htmlf(const char *format, ...)
 {
        static char buf[65536];
        va_list args;
        va_start(args, format);
        vsnprintf(buf, sizeof(buf), format, args);
        va_end(args);
        html(buf);
 }
 void html_txt(char *txt)
 {
        char *t = txt;
        while(t && *t){
                int c = *t;
                if (c=='<' || c=='>' || c=='&') {
                        *t = '\0';
                        html(txt);
                        *t = c;
                        if (c=='>')
                                html("&gt;");
                        else if (c=='<')
                                html("&lt;");
                        else if (c=='&')
                                html("&amp;");
                        txt = t+1;
                }
                t++;
        }
        if (t!=txt)
                html(txt);
 }
 void html_ntxt(int len, char *txt)
 {
        char *t = txt;
        while(t && *t && len--){
                int c = *t;
                if (c=='<' || c=='>' || c=='&') {
                        *t = '\0';
                        html(txt);
                        *t = c;
                        if (c=='>')
                                html("&gt;");
                        else if (c=='<')
                                html("&lt;");
                        else if (c=='&')
                                html("&amp;");
                        txt = t+1;
                }
                t++;
        }
        if (t!=txt) {
                char c = *t;
                *t = '\0';
                html(txt);
                *t = c;
        }
        if (len<0)
                html("...");
 }
 void html_attr(char *txt)
 {
        char *t = txt;
        while(t && *t){
                int c = *t;
                if (c=='<' || c=='>' || c=='\'') {
                        *t = '\0';
                        html(txt);
                        *t = c;
                        if (c=='>')
                                html("&gt;");
                        else if (c=='<')
                                html("&lt;");
                        else if (c=='\'')
                                html("&quote;");
                        txt = t+1;
                }
                t++;
        }
        if (t!=txt)
                html(txt);
 }
 void html_hidden(char *name, char *value)
 {
        html("<input type='hidden' name='");
        html_attr(name);
        html("' value='");
        html_attr(value);
        html("'/>");
 }
 void html_option(char *value, char *text, char *selected_value)
 {
        html("<option value='");
        html_attr(value);
        html("'");
        if (selected_value && !strcmp(selected_value, value))
                html(" selected='selected'");
        html(">");
        html_txt(text);
        html("</option>\n");
 }
 void html_link_open(char *url, char *title, char *class)
 {
        html("<a href='");
        html_attr(url);
        if (title) {
                html("' title='");
                html_attr(title);
        }
        if (class) {
                html("' class='");
                html_attr(class);
        }
        html("'>");
 }
 void html_link_close(void)
 {
        html("</a>");
 }
 void html_fileperm(unsigned short mode)
 {
        htmlf("%c%c%c", (mode & 4 ? 'r' : '-'),
              (mode & 2 ? 'w' : '-'), (mode & 1 ? 'x' : '-'));
 }
 int html_include(const char *filename)
 {
        FILE *f;
        char buf[4096];
        size_t len;
        if (!(f = fopen(filename, "r")))
                return -1;
        while((len = fread(buf, 1, 4096, f)) > 0)
                write(htmlfd, buf, len);
        fclose(f);
        return 0;
 }
+int hextoint(char c)
+{
+        if (c >= 'a' && c <= 'f')
+                return 10 + c - 'a';
+        else if (c >= 'A' && c <= 'F')
+                return 10 + c - 'A';
+        else if (c >= '0' && c <= '9')
+                return c - '0';
+        else
+                return -1;
+}
+char *convert_query_hexchar(char *txt)
+{
+        int d1, d2;
+        if (strlen(txt) < 3) {
+                *txt = '\0';
+                return txt-1;
+        }
+        d1 = hextoint(*(txt+1));
+        d2 = hextoint(*(txt+2));
+        if (d1<0 || d2<0) {
+                strcpy(txt, txt+3);
+                return txt-1;
+        } else {
+                *txt = d1 * 16 + d2;
+                strcpy(txt+1, txt+3);
+                return txt;
+        }
+}
+int http_parse_querystring(char *txt, void (*fn)(const char *name, const char *value))
+{
+        char *t, *value = NULL, c;
+        if (!txt)
+                return 0;
+        t = txt = strdup(txt);
+        if (t == NULL) {
+                printf("Out of memory\n");
+                exit(1);
+        }
+        while((c=*t) != '\0') {
+                if (c=='=') {
+                        *t = '\0';
+                        value = t+1;
+                } else if (c=='+') {
+                        *t = ' ';
+                } else if (c=='%') {
+                        t = convert_query_hexchar(t);
+                } else if (c=='&') {
+                        *t = '\0';
+                        (*fn)(txt, value);
+                        txt = t+1;
+                        value = NULL;
+                }
+                t++;
+        }
+        if (t!=txt)
+                (*fn)(txt, value);
+        return 0;
+}