121 lines
2.4 KiB
C
121 lines
2.4 KiB
C
#include "links.h"
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static void base64_decode(unsigned char **d, int *dl, unsigned char *s, int sl)
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{
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int bits = 0;
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unsigned tmp = 0;
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for (; sl > 0; s++, sl--) {
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unsigned char val;
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unsigned char c = *s;
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if (c >= 'A' && c <= 'Z') val = c - 'A';
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else if (c >= 'a' && c <= 'z') val = c - 'a' + 26;
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else if (c >= '0' && c <= '9') val = c - '0' + 52;
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else if (c == '+') val = 62;
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else if (c == '/') val = 63;
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else continue;
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tmp <<= 6;
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tmp |= val;
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bits += 6;
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if (bits >= 8) {
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bits -= 8;
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add_chr_to_str(d, dl, tmp >> bits);
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tmp &= (1 << bits) - 1;
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}
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}
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}
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void data_func(struct connection *c)
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{
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unsigned char *data, *flags, *mime, *str;
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size_t length;
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int strl;
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struct cache_entry *e;
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int r;
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int base64 = 0;
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int was_charset = 0;
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flags = cast_uchar strchr(cast_const_char c->url, ':');
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if (!flags) {
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bad_url:
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setcstate(c, S_BAD_URL);
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abort_connection(c);
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return;
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}
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flags++;
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while (*flags == '/') flags++;
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length = strcspn(cast_const_char flags, ";,");
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mime = memacpy(flags, length);
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while (*(flags += length) == ';') {
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unsigned char *arg;
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flags++;
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length = strcspn(cast_const_char flags, ";,");
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arg = memacpy(flags, length);
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if (!casestrcmp(arg, cast_uchar "base64")) {
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base64 = 1;
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} else if (!casecmp(arg, cast_uchar "charset=", 8)) {
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if (!was_charset) {
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add_to_strn(&mime, cast_uchar ";");
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add_to_strn(&mime, arg);
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was_charset = 1;
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}
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}
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mem_free(arg);
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}
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if (*flags != ',') {
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mem_free(mime);
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goto bad_url;
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}
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data = flags + 1;
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if (!c->cache) {
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if (get_connection_cache_entry(c)) {
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mem_free(mime);
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setcstate(c, S_OUT_OF_MEM);
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abort_connection(c);
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return;
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}
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c->cache->refcount--;
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}
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e = c->cache;
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if (e->head) mem_free(e->head);
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e->head = stracpy(cast_uchar "");
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if (*mime) {
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add_to_strn(&e->head, cast_uchar "\r\nContent-type: ");
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add_to_strn(&e->head, mime);
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add_to_strn(&e->head, cast_uchar "\r\n");
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}
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mem_free(mime);
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str = init_str();
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strl = 0;
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add_conv_str(&str, &strl, data, (int)strlen(cast_const_char data), -2);
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if (!base64) {
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r = add_fragment(e, 0, str, strl);
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} else {
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unsigned char *b64 = init_str();
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int b64l = 0;
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base64_decode(&b64, &b64l, str, strl);
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r = add_fragment(e, 0, b64, b64l);
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mem_free(b64);
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}
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mem_free(str);
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if (r < 0) {
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setcstate(c, r);
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abort_connection(c);
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return;
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}
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truncate_entry(e, strl, 1);
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c->cache->incomplete = 0;
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setcstate(c, S__OK);
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abort_connection(c);
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}
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