The process of initiating an action on a server is done through HTTP requests which are messages sent by the client.
The two most commonly used HTTP requests are GET and POST. This task involves validating requests and parsing URL
parameters as a form of authentication. Authentication tokens for both GET and POST requests are sent as a URL
parameter named "token". For validation of authentication, the tokens must be in a set of valid authentication tokens.
In the case of a POST request, a CSRF (cross-site request forgery) token must also be provided. A POST request is
considered valid if its authentication token is valid and its CSRF token is an alphanumeric value consisting only of
lowercase letters and/or numbers with a minimum length of 8. Once a request is validated, the URL parameters must be
parsed as a comma-separated string.
URL parameters are identified by the portion of the URL that comes after a question mark (?). They consist of a key
and a value, separated by an equal sign (=). Multiple parameters are separated by an ampersand (&).
Implementation request parser prototype. Given an array of strings, valid_auth_tokens, representing the
valid authentication tokens, and a 2D array of strings, requests, representing the requests and URLs,
for each request, return the request status ("VALID" or "INVALID"). If VALID, include a comma-separated list of
parameters, i.e. "VALID,param1_key=param1_value,param2_key=param2_value".
Function Description
Complete the function getResponses in the editor.
getResponses has the following parameters(s):
- 1. string
valid_auth_tokens[m]: The list of valid authentication tokens - 2. string
requests[n][2]: The list of requests made, their types, and the associated URLs.
Returns
string[n]: the responses for each request
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Example 1:
Input: valid_auth_tokens = ["ah37iz2ha483u", "sah34ywbd0op5", "ba34av8iy902j"], requests = [["GET", "https://example.com?token=34dy58kiu2"], ["GET", "https://example.com?token=sah34ywbd0op5&name=sam"], ["POST", "https://example.com?token=sah34ywbd0op5"], ["POST", "https://example.com?token=sah34ywbd0op5&name=chris&csrf_token=ak2sh32dy"]]
Output: ["INVALID", "VALID,name=sam", "INVALID", "VALID,name=chris"]
Explanation:In the first request, the auth_token "34dy58kiu2", which is not in the list of given tokens, so the request is INVALID. The string to be returned is "INVALID". In the second request, the auth_token = sah34ywbd0op5, which is in the list of valid tokens, the request is VALID. The request parameters are _name = sam. The string to be returned is "VALID,name=sam". In the third request, the auth_token = sah34ywbd0op5, which is in the list of valid tokens, but since the request is a POST request, it must have a valid CSRF token. Since the given request doesn't have a CSRF token, the request is INVALID. The string to be returned is "INVALID". In the fourth request, the auth_token = sah34ywbd0op5, which is in the list of valid tokens, but since the request is a POST request, it must have a valid CSRF token. CSRF_token = ak2sh32dy, it is an alphanumeric string with length 9(>=8), so the given request is VALID. The request parameters are _name = chris. The string to be returned is "VALID,name=chris".
- 1 <= m <= 2*103
- 1 <= n <= 5*103
- size(valid_auth_token[i]) = 12
- size(requests[i][0]) <= 20
input:
output: