99 lines
2.5 KiB
C
99 lines
2.5 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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const char *validate(const char *data)
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{
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int i;
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// name1
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if (strncmp(data,"name1=",6) != 0)
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return "invalid query string: must start with 'name1='";
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i = 6;
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while (isalnum(data[i]))
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i++;
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if (i == 6)
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return "invalid query string: no name1";
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if (i > 36)
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return "invalid query string: max name1 size is 30";
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// name2
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const int i1 = i;
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if (strncmp(data+i,"&name2=",7) != 0)
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return "invalid query string: no name2";
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i += 7;
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if (!isalnum(data[i]))
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return "invalid query string: empty name2";
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while (isalnum(data[i]))
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i++;
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if (i - i1 > 37)
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return "invalid query string: max name2 size is 30";
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if (data[i] != '\0')
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return "invalid query string: invalid char in name2";
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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 (NULL != validate(query_string)) {
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generatepage(validate(query_string));
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} else {
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char *data[MAX_RECORDS] = {0};
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if (!readdata(data, MAX_RECORDS)) {
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generatepage("access failed, try again");
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return EXIT_SUCCESS;
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}
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sortdata(data, MAX_RECORDS);
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// Get name1 and name2..
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char buf[strlen(query_string)];
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strcpy(buf, query_string);
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const char * const name1 = strstr(buf, "name1=") + 6;
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const char * const name2 = strstr(buf, "name2=") + 6;
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for (int i = 0; buf[i] != '\0'; i++) {
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if (buf[i] == '&')
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buf[i] = '\0';
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}
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int index = -1;
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for (int i = 0; i < MAX_RECORDS && data[i]; i++) {
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if (strcmp(name1, getname(data[i])) == 0) {
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index = i;
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break;
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}
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}
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if (index == -1) {
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generatepage("file not found");
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return EXIT_SUCCESS;
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}
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FILE *f = fopen("data.txt", "wt");
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if (f == NULL) {
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generatepage("failed to rename 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 && data[i]; i++) {
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if (i == index)
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fprintf(f, "name=%s%s\n", name2, data[i]+5+strlen(name1));
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else
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fprintf(f, "%s\n", data[i]);
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}
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fclose(f);
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generatepage("file renamed");
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}
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return EXIT_SUCCESS;
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}
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