47 lines
1.0 KiB
C
47 lines
1.0 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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static void unencode(const char *src, char *dest)
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{
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for (; *src; src++, dest++) {
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if (*src == '+')
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*dest = ' ';
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else if (*src == '%') {
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int code;
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if (sscanf(src+1, "%2x", &code) != 1)
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code = '?';
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*dest = code;
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src += 2;
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} else
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*dest = *src;
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}
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*dest = '\0';
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}
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int main()
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{
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const char *query_string = getenv("QUERY_STRING");
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if (query_string == NULL) {
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printf("Content-type: text/plain\n\n");
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printf("empty/invalid data\n");
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} else if (strlen(query_string) > 1024) {
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printf("Content-type: text/plain\n\n");
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printf("data size limit exceeded (1024)\n");
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} else {
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char data[4096] = {0};
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unencode(query_string, data);
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FILE *f = fopen("data.txt", "a");
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fprintf(f,"%s\n",data);
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fclose(f);
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printf("Content-type: text/plain\n\n");
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printf("saved\n");
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}
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return EXIT_SUCCESS;
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}
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