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-rw-r--r--html.c84
1 files changed, 56 insertions, 28 deletions
diff --git a/html.c b/html.c index 5336596..a60bc13 100644 --- a/html.c +++ b/html.c
@@ -13,6 +13,32 @@
13#include <string.h> 13#include <string.h>
14#include <errno.h> 14#include <errno.h>
15 15
16/* Percent-encoding of each character, except: a-zA-Z0-9!$()*,./:;@- */
17static const char* url_escape_table[256] = {
18 "%00", "%01", "%02", "%03", "%04", "%05", "%06", "%07", "%08", "%09",
19 "%0a", "%0b", "%0c", "%0d", "%0e", "%0f", "%10", "%11", "%12", "%13",
20 "%14", "%15", "%16", "%17", "%18", "%19", "%1a", "%1b", "%1c", "%1d",
21 "%1e", "%1f", "+", 0, "%22", "%23", 0, "%25", "%26", "%27", 0, 0, 0,
22 "%2b", 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, "%3c", "%3d",
23 "%3e", "%3f", 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
24 0, 0, 0, 0, 0, 0, 0, 0, 0, "%5c", 0, "%5e", 0, "%60", 0, 0, 0, 0, 0,
25 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, "%7b",
26 "%7c", "%7d", 0, "%7f", "%80", "%81", "%82", "%83", "%84", "%85",
27 "%86", "%87", "%88", "%89", "%8a", "%8b", "%8c", "%8d", "%8e", "%8f",
28 "%90", "%91", "%92", "%93", "%94", "%95", "%96", "%97", "%98", "%99",
29 "%9a", "%9b", "%9c", "%9d", "%9e", "%9f", "%a0", "%a1", "%a2", "%a3",
30 "%a4", "%a5", "%a6", "%a7", "%a8", "%a9", "%aa", "%ab", "%ac", "%ad",
31 "%ae", "%af", "%b0", "%b1", "%b2", "%b3", "%b4", "%b5", "%b6", "%b7",
32 "%b8", "%b9", "%ba", "%bb", "%bc", "%bd", "%be", "%bf", "%c0", "%c1",
33 "%c2", "%c3", "%c4", "%c5", "%c6", "%c7", "%c8", "%c9", "%ca", "%cb",
34 "%cc", "%cd", "%ce", "%cf", "%d0", "%d1", "%d2", "%d3", "%d4", "%d5",
35 "%d6", "%d7", "%d8", "%d9", "%da", "%db", "%dc", "%dd", "%de", "%df",
36 "%e0", "%e1", "%e2", "%e3", "%e4", "%e5", "%e6", "%e7", "%e8", "%e9",
37 "%ea", "%eb", "%ec", "%ed", "%ee", "%ef", "%f0", "%f1", "%f2", "%f3",
38 "%f4", "%f5", "%f6", "%f7", "%f8", "%f9", "%fa", "%fb", "%fc", "%fd",
39 "%fe", "%ff"
40};
41
16int htmlfd = STDOUT_FILENO; 42int htmlfd = STDOUT_FILENO;
17 43
18char *fmt(const char *format, ...) 44char *fmt(const char *format, ...)
@@ -63,13 +89,13 @@ void html_status(int code, const char *msg, int more_headers)
63 html("\n"); 89 html("\n");
64} 90}
65 91
66void html_txt(char *txt) 92void html_txt(const char *txt)
67{ 93{
68 char *t = txt; 94 const char *t = txt;
69 while(t && *t){ 95 while(t && *t){
70 int c = *t; 96 int c = *t;
71 if (c=='<' || c=='>' || c=='&') { 97 if (c=='<' || c=='>' || c=='&') {
72 write(htmlfd, txt, t - txt); 98 html_raw(txt, t - txt);
73 if (c=='>') 99 if (c=='>')
74 html("&gt;"); 100 html("&gt;");
75 else if (c=='<') 101 else if (c=='<')
@@ -84,13 +110,13 @@ void html_txt(char *txt)
84 html(txt); 110 html(txt);
85} 111}
86 112
87void html_ntxt(int len, char *txt) 113void html_ntxt(int len, const char *txt)
88{ 114{
89 char *t = txt; 115 const char *t = txt;
90 while(t && *t && len--){ 116 while(t && *t && len--){
91 int c = *t; 117 int c = *t;
92 if (c=='<' || c=='>' || c=='&') { 118 if (c=='<' || c=='>' || c=='&') {
93 write(htmlfd, txt, t - txt); 119 html_raw(txt, t - txt);
94 if (c=='>') 120 if (c=='>')
95 html("&gt;"); 121 html("&gt;");
96 else if (c=='<') 122 else if (c=='<')
@@ -102,18 +128,18 @@ void html_ntxt(int len, char *txt)
102 t++; 128 t++;
103 } 129 }
104 if (t!=txt) 130 if (t!=txt)
105 write(htmlfd, txt, t - txt); 131 html_raw(txt, t - txt);
106 if (len<0) 132 if (len<0)
107 html("..."); 133 html("...");
108} 134}
109 135
110void html_attr(char *txt) 136void html_attr(const char *txt)
111{ 137{
112 char *t = txt; 138 const char *t = txt;
113 while(t && *t){ 139 while(t && *t){
114 int c = *t; 140 int c = *t;
115 if (c=='<' || c=='>' || c=='\'' || c=='\"') { 141 if (c=='<' || c=='>' || c=='\'' || c=='\"') {
116 write(htmlfd, txt, t - txt); 142 html_raw(txt, t - txt);
117 if (c=='>') 143 if (c=='>')
118 html("&gt;"); 144 html("&gt;");
119 else if (c=='<') 145 else if (c=='<')
@@ -130,14 +156,15 @@ void html_attr(char *txt)
130 html(txt); 156 html(txt);
131} 157}
132 158
133void html_url_path(char *txt) 159void html_url_path(const char *txt)
134{ 160{
135 char *t = txt; 161 const char *t = txt;
136 while(t && *t){ 162 while(t && *t){
137 int c = *t; 163 int c = *t;
138 if (c=='"' || c=='#' || c=='\'' || c=='?') { 164 const char *e = url_escape_table[c];
139 write(htmlfd, txt, t - txt); 165 if (e && c!='+' && c!='&' && c!='+') {
140 write(htmlfd, fmt("%%%2x", c), 3); 166 html_raw(txt, t - txt);
167 html_raw(e, 3);
141 txt = t+1; 168 txt = t+1;
142 } 169 }
143 t++; 170 t++;
@@ -146,14 +173,15 @@ void html_url_path(char *txt)
146 html(txt); 173 html(txt);
147} 174}
148 175
149void html_url_arg(char *txt) 176void html_url_arg(const char *txt)
150{ 177{
151 char *t = txt; 178 const char *t = txt;
152 while(t && *t){ 179 while(t && *t){
153 int c = *t; 180 int c = *t;
154 if (c=='"' || c=='#' || c=='%' || c=='&' || c=='\'' || c=='+' || c=='?') { 181 const char *e = url_escape_table[c];
155 write(htmlfd, txt, t - txt); 182 if (e) {
156 write(htmlfd, fmt("%%%2x", c), 3); 183 html_raw(txt, t - txt);
184 html_raw(e, strlen(e));
157 txt = t+1; 185 txt = t+1;
158 } 186 }
159 t++; 187 t++;
@@ -162,7 +190,7 @@ void html_url_arg(char *txt)
162 html(txt); 190 html(txt);
163} 191}
164 192
165void html_hidden(char *name, char *value) 193void html_hidden(const char *name, const char *value)
166{ 194{
167 html("<input type='hidden' name='"); 195 html("<input type='hidden' name='");
168 html_attr(name); 196 html_attr(name);
@@ -171,7 +199,7 @@ void html_hidden(char *name, char *value)
171 html("'/>"); 199 html("'/>");
172} 200}
173 201
174void html_option(char *value, char *text, char *selected_value) 202void html_option(const char *value, const char *text, const char *selected_value)
175{ 203{
176 html("<option value='"); 204 html("<option value='");
177 html_attr(value); 205 html_attr(value);
@@ -183,7 +211,7 @@ void html_option(char *value, char *text, char *selected_value)
183 html("</option>\n"); 211 html("</option>\n");
184} 212}
185 213
186void html_link_open(char *url, char *title, char *class) 214void html_link_open(const char *url, const char *title, const char *class)
187{ 215{
188 html("<a href='"); 216 html("<a href='");
189 html_attr(url); 217 html_attr(url);
@@ -221,7 +249,7 @@ int html_include(const char *filename)
221 return -1; 249 return -1;
222 } 250 }
223 while((len = fread(buf, 1, 4096, f)) > 0) 251 while((len = fread(buf, 1, 4096, f)) > 0)
224 write(htmlfd, buf, len); 252 html_raw(buf, len);
225 fclose(f); 253 fclose(f);
226 return 0; 254 return 0;
227} 255}
@@ -258,14 +286,14 @@ char *convert_query_hexchar(char *txt)
258 } 286 }
259} 287}
260 288
261int http_parse_querystring(char *txt, void (*fn)(const char *name, const char *value)) 289int http_parse_querystring(const char *txt_, void (*fn)(const char *name, const char *value))
262{ 290{
263 char *t, *value = NULL, c; 291 char *t, *txt, *value = NULL, c;
264 292
265 if (!txt) 293 if (!txt_)
266 return 0; 294 return 0;
267 295
268 t = txt = strdup(txt); 296 t = txt = strdup(txt_);
269 if (t == NULL) { 297 if (t == NULL) {
270 printf("Out of memory\n"); 298 printf("Out of memory\n");
271 exit(1); 299 exit(1);
© 2022 C. Duckworth. generated by cgit. comments, issues, and patches welcome at < git at acdw dot net >.