| /* html.c: helper functions for html output |
| * |
| * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com> |
| * |
| * Licensed under GNU General Public License v2 |
| * (see COPYING for full license text) |
| */ |
| |
| #include "cgit.h" |
| #include "html.h" |
| #include "url.h" |
| |
| /* Percent-encoding of each character, except: a-zA-Z0-9!$()*,./:;@- */ |
| static const char* url_escape_table[256] = { |
| "%00", "%01", "%02", "%03", "%04", "%05", "%06", "%07", |
| "%08", "%09", "%0a", "%0b", "%0c", "%0d", "%0e", "%0f", |
| "%10", "%11", "%12", "%13", "%14", "%15", "%16", "%17", |
| "%18", "%19", "%1a", "%1b", "%1c", "%1d", "%1e", "%1f", |
| "%20", NULL, "%22", "%23", NULL, "%25", "%26", "%27", |
| NULL, NULL, NULL, "%2b", NULL, NULL, NULL, NULL, |
| NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| NULL, NULL, NULL, NULL, "%3c", "%3d", "%3e", "%3f", |
| NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| NULL, NULL, NULL, NULL, "%5c", NULL, "%5e", NULL, |
| "%60", NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| NULL, NULL, NULL, "%7b", "%7c", "%7d", NULL, "%7f", |
| "%80", "%81", "%82", "%83", "%84", "%85", "%86", "%87", |
| "%88", "%89", "%8a", "%8b", "%8c", "%8d", "%8e", "%8f", |
| "%90", "%91", "%92", "%93", "%94", "%95", "%96", "%97", |
| "%98", "%99", "%9a", "%9b", "%9c", "%9d", "%9e", "%9f", |
| "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%a7", |
| "%a8", "%a9", "%aa", "%ab", "%ac", "%ad", "%ae", "%af", |
| "%b0", "%b1", "%b2", "%b3", "%b4", "%b5", "%b6", "%b7", |
| "%b8", "%b9", "%ba", "%bb", "%bc", "%bd", "%be", "%bf", |
| "%c0", "%c1", "%c2", "%c3", "%c4", "%c5", "%c6", "%c7", |
| "%c8", "%c9", "%ca", "%cb", "%cc", "%cd", "%ce", "%cf", |
| "%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7", |
| "%d8", "%d9", "%da", "%db", "%dc", "%dd", "%de", "%df", |
| "%e0", "%e1", "%e2", "%e3", "%e4", "%e5", "%e6", "%e7", |
| "%e8", "%e9", "%ea", "%eb", "%ec", "%ed", "%ee", "%ef", |
| "%f0", "%f1", "%f2", "%f3", "%f4", "%f5", "%f6", "%f7", |
| "%f8", "%f9", "%fa", "%fb", "%fc", "%fd", "%fe", "%ff" |
| }; |
| |
| 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]; |
| } |
| |
| char *fmtalloc(const char *format, ...) |
| { |
| struct strbuf sb = STRBUF_INIT; |
| va_list args; |
| |
| va_start(args, format); |
| strbuf_vaddf(&sb, format, args); |
| va_end(args); |
| |
| return strbuf_detach(&sb, NULL); |
| } |
| |
| void html_raw(const char *data, size_t size) |
| { |
| if (write(STDOUT_FILENO, data, size) != size) |
| die_errno("write error on html output"); |
| } |
| |
| void html(const char *txt) |
| { |
| html_raw(txt, strlen(txt)); |
| } |
| |
| void htmlf(const char *format, ...) |
| { |
| va_list args; |
| struct strbuf buf = STRBUF_INIT; |
| |
| va_start(args, format); |
| strbuf_vaddf(&buf, format, args); |
| va_end(args); |
| html(buf.buf); |
| strbuf_release(&buf); |
| } |
| |
| void html_txtf(const char *format, ...) |
| { |
| va_list args; |
| |
| va_start(args, format); |
| html_vtxtf(format, args); |
| va_end(args); |
| } |
| |
| void html_vtxtf(const char *format, va_list ap) |
| { |
| va_list cp; |
| struct strbuf buf = STRBUF_INIT; |
| |
| va_copy(cp, ap); |
| strbuf_vaddf(&buf, format, cp); |
| va_end(cp); |
| html_txt(buf.buf); |
| strbuf_release(&buf); |
| } |
| |
| void html_txt(const char *txt) |
| { |
| if (txt) |
| html_ntxt(txt, strlen(txt)); |
| } |
| |
| ssize_t html_ntxt(const char *txt, size_t len) |
| { |
| const char *t = txt; |
| ssize_t slen; |
| |
| if (len > SSIZE_MAX) |
| return -1; |
| |
| slen = (ssize_t) len; |
| while (t && *t && slen--) { |
| int c = *t; |
| if (c == '<' || c == '>' || c == '&') { |
| html_raw(txt, t - txt); |
| if (c == '>') |
| html(">"); |
| else if (c == '<') |
| html("<"); |
| else if (c == '&') |
| html("&"); |
| txt = t + 1; |
| } |
| t++; |
| } |
| if (t != txt) |
| html_raw(txt, t - txt); |
| return slen; |
| } |
| |
| void html_attrf(const char *fmt, ...) |
| { |
| va_list ap; |
| struct strbuf sb = STRBUF_INIT; |
| |
| va_start(ap, fmt); |
| strbuf_vaddf(&sb, fmt, ap); |
| va_end(ap); |
| |
| html_attr(sb.buf); |
| strbuf_release(&sb); |
| } |
| |
| void html_attr(const char *txt) |
| { |
| const char *t = txt; |
| while (t && *t) { |
| int c = *t; |
| if (c == '<' || c == '>' || c == '\'' || c == '\"' || c == '&') { |
| html_raw(txt, t - txt); |
| if (c == '>') |
| html(">"); |
| else if (c == '<') |
| html("<"); |
| else if (c == '\'') |
| html("'"); |
| else if (c == '"') |
| html("""); |
| else if (c == '&') |
| html("&"); |
| txt = t + 1; |
| } |
| t++; |
| } |
| if (t != txt) |
| html(txt); |
| } |
| |
| void html_url_path(const char *txt) |
| { |
| const char *t = txt; |
| while (t && *t) { |
| unsigned char c = *t; |
| const char *e = url_escape_table[c]; |
| if (e && c != '+' && c != '&') { |
| html_raw(txt, t - txt); |
| html(e); |
| txt = t + 1; |
| } |
| t++; |
| } |
| if (t != txt) |
| html(txt); |
| } |
| |
| void html_url_arg(const char *txt) |
| { |
| const char *t = txt; |
| while (t && *t) { |
| unsigned char c = *t; |
| const char *e = url_escape_table[c]; |
| if (c == ' ') |
| e = "+"; |
| if (e) { |
| html_raw(txt, t - txt); |
| html(e); |
| txt = t + 1; |
| } |
| t++; |
| } |
| if (t != txt) |
| html(txt); |
| } |
| |
| void html_header_arg_in_quotes(const char *txt) |
| { |
| const char *t = txt; |
| while (t && *t) { |
| unsigned char c = *t; |
| const char *e = NULL; |
| if (c == '\\') |
| e = "\\\\"; |
| else if (c == '\r') |
| e = "\\r"; |
| else if (c == '\n') |
| e = "\\n"; |
| else if (c == '"') |
| e = "\\\""; |
| if (e) { |
| html_raw(txt, t - txt); |
| html(e); |
| txt = t + 1; |
| } |
| t++; |
| } |
| if (t != txt) |
| html(txt); |
| |
| } |
| |
| void html_hidden(const char *name, const char *value) |
| { |
| html("<input type='hidden' name='"); |
| html_attr(name); |
| html("' value='"); |
| html_attr(value); |
| html("'/>"); |
| } |
| |
| void html_option(const char *value, const char *text, const 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_intoption(int value, const char *text, int selected_value) |
| { |
| htmlf("<option value='%d'%s>", value, |
| value == selected_value ? " selected='selected'" : ""); |
| html_txt(text); |
| html("</option>"); |
| } |
| |
| void html_link_open(const char *url, const char *title, const 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"))) { |
| fprintf(stderr, "[cgit] Failed to include file %s: %s (%d).\n", |
| filename, strerror(errno), errno); |
| return -1; |
| } |
| while ((len = fread(buf, 1, 4096, f)) > 0) |
| html_raw(buf, len); |
| fclose(f); |
| return 0; |
| } |
| |
| void http_parse_querystring(const char *txt, void (*fn)(const char *name, const char *value)) |
| { |
| const char *t = txt; |
| |
| while (t && *t) { |
| char *name = url_decode_parameter_name(&t); |
| if (*name) { |
| char *value = url_decode_parameter_value(&t); |
| fn(name, value); |
| free(value); |
| } |
| free(name); |
| } |
| } |