78 lines
1.9 KiB
C
78 lines
1.9 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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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 "invalid delete command";
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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: invalid request");
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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("Failed to delete file, 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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char name[32] = {0};
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strcpy(name, getname(query_string));
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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(name, 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 delete file (access denied)");
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return EXIT_SUCCESS;
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}
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int deleted = 0;
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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, "%s\n", data[i]);
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else
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deleted = 1;
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}
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fclose(f);
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generatepage(deleted ? "File deleted" : "Failed to delete file");
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}
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return EXIT_SUCCESS;
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}
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