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本帖最后由 linux_c_py_php 于 2012-10-13 11:43 编辑
- [root@vps616 php]# php main.php
- ${PRODUCT_NAME}
- 书旗免费小说
- 开心水族箱[root@vps616 php]# cat main.php
- <?php
- $content = <<<EOF
- $%7BPRODUCT_NAME%7D
- %E4%B9%A6%E6%97%97%E5%85%8D%E8%B4%B9%E5%B0%8F%E8%AF%B4
- %E5%BC%80%E5%BF%83%E6%B0%B4%E6%97%8F%E7%AE%B1
- EOF;
- echo urldecode($content);
- ?>
复制代码 额, 是C代码, 写了个, 感觉有点糟烂.- urldecode=0 out=${PRODUCT_NAME}书旗免费小说开心水族箱
- [root@vps616 c]# cat main.c
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- int urldecode(const char *in, int *in_size, char *out, int *out_size) {
- if (!in || !out || !in_size || !out_size)
- return -1;
- int indx, ondx;
- for (indx = ondx = 0; *in_size > 0 && *out_size > 0; -- *out_size, ++ ondx) {
- int drain = 0;
- if (in[indx] == '+') {
- out[ondx] = ' ';
- drain = 1;
- } else if (in[indx] == '%') {
- if (*in_size < 3)
- return 0;
- int i;
- char base_chr;
- char out_byte = 0;
-
- for (i = 1; i < 3; ++ i) {
- int index = indx + i;
-
- if (in[index] >= '0' && in[index] <= '9')
- base_chr = '0';
- else if (in[index] >= 'a' && in[index] <= 'z')
- base_chr = 'a' - 10;
- else if (in[index] >= 'A' && in[index] <= 'Z')
- base_chr = 'A' - 10;
- else
- return -1;
- out_byte = (out_byte << 4) | (in[index] - base_chr);
- }
- out[ondx] = out_byte;
- drain = 3;
- } else {
- out[ondx] = in[indx];
- drain = 1;
- }
-
- indx += drain;
- *in_size -= drain;
- }
- return 0;
- }
- int main(int argc, char* const argv[]) {
- const char *in = "$%7BPRODUCT_NAME%7D"
- "%E4%B9%A6%E6%97%97%E5%85%8D%E8%B4%B9%E5%B0%8F%E8%AF%B4"
- "%E5%BC%80%E5%BF%83%E6%B0%B4%E6%97%8F%E7%AE%B1";
-
- int in_size = strlen(in);
- int out_size = in_size;
- char *out = calloc(1, out_size + 1);
- int ret = urldecode(in, &in_size, out, &out_size);
- printf("urldecode=%d out=%s\n", ret, out);
- free(out);
- return 0;
- }
复制代码 |
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