88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include "webarchive.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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const char *validate(const char *data)
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{
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int i;
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if (strncmp(data,"name=",5) != 0)
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return "invalid query string: must start with 'name='";
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i = 5;
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while (isalnum(data[i]))
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i++;
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if (i == 5)
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return "invalid query string: no name";
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if (i > 35)
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return "invalid query string: max name size is 32";
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if (data[i] == '\0')
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return NULL;
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if (data[i] != '&')
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return "invalid query string: only alphanumeric characters are allowed in the name";
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if (strncmp(data+i,"&data=",6)!=0)
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return "invalid query string";
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i += 6;
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// TODO: check XML data..
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return NULL;
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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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generatepage("Internal error: empty/invalid data");
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} else if (strlen(query_string) > 1024) {
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generatepage("Internal error: data size limit exceeded (1024)");
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} else if (NULL != validate(query_string)) {
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generatepage(validate(query_string));
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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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if (NULL != validate(data)) {
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generatepage(validate(data));
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} else {
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char *olddata[MAX_RECORDS] = {0};
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olddata[0] = data;
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if (!readdata(&olddata[1], MAX_RECORDS-1)) {
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generatepage("Failed to add file (access denied). Try again.");
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return EXIT_SUCCESS;
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}
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sortdata(olddata, MAX_RECORDS);
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FILE *f = fopen("data.txt", "wt");
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if (f == NULL) {
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generatepage("Failed to add file (access denied). Try again.");
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return EXIT_SUCCESS;
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}
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for (int i = 0; i < MAX_RECORDS && olddata[i]; i++)
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fprintf(f, "%s\n", olddata[i]);
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fclose(f);
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generatepage("saved.");
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}
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}
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return EXIT_SUCCESS;
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}
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