VirtualJudge system development 2: submission module

VirtualJudge system development 2: submission module this time we will talk about the submission module.

Before writing this article, I saw someone discussing the legitimacy and morality of vj. However, I will not talk about this in this article. we only care about technology.

We use php to implement the commit, so we have to use a kind of thing: curl. However, by default, php does not enable curl support. no matter how you use it, it is enough to make it work. if you don't talk about it, paste the code directly:

Public function POJ_DataPoster_Worker ($ user = "skvj01", $ pass =

"Forskvj", $ id = "1000", $ lang = "0", $ code = "", $ rid = ""){

If (DEBUG)

Echo "[D] => $ user, $ pass, $ id, $ lang, $ rid \ n"; // MySQL $ this-> db = new dMySQL (); // Infomation $ cookie_file =

Tempnam ("./cookie", "cookie"); $ login_url = "http://poj.org/login ";

$ Post_fields = "user_id1 =". $ user. "& password1 =". $ pass. "& url = /";

$ This-> rid = $ rid; $ this-> pid = $ id; $ this-> lang = $ lang;

$ This-> user = $ user; $ this-> pass = $ pass;

// Login $ curl = curl_init ($ login_url );

Curl_setopt ($ curl, CURLOPT_HEADER, 0); curl_setopt ($ curl, CURLOPT_RETURNTRANSFER, 1); curl_setopt ($ curl, CURLOPT_COOKIEJAR,

$ Cookie_file); curl_setopt ($ curl, CURLOPT_POST, 1 );

Curl_setopt ($ curl, CURLOPT_POSTFIELDS, $ post_fields );

$ This-> data = curl_exec ($ curl); curl_close ($ curl );

// Submit $ hint_code =/"//". $ rid. "\ n"./$ code; $ post_fields =

'Problem _ id = '. $ id.' & language ='

. $ Lang. '& encoded = 1 & source ='. urlencode ($ hint_code );

// Print_r (base64_encode ($ code); $ curl =

Curl_init ("http://poj.org/submit ");

Curl_setopt ($ curl, CURLOPT_HEADER, 0); curl_setopt ($ curl, CURLOPT_RETURNTRANSFER, 1); curl_setopt ($ curl, CURLOPT_COOKIEFILE,

$ Cookie_file); curl_setopt ($ curl, CURLOPT_POST, 1 );

Curl_setopt ($ curl, CURLOPT_POSTFIELDS, $ post_fields );

$ This-> data = curl_exec ($ curl); curl_close ($ curl );

@ Unlink ($ cookie_file );

// Record Information $ this-> info = array (

'Id' => $ rid,

'User' => $ user

);

}

Here we use POJ as an example. records will be generated immediately after POJ is submitted, while HDOJ is not. here we use curl to simulate the submission.

$ Pdw = new POJ_DataPoster_Worker ($ oo_u, $ oo_p, $ list [$ I] ['tid'],

$ List [$ I] ['Lang '], $ list [$ I] ['code'], $ list [$ I] ['id']); $ rrid =

$ Pdw-> getRunID ()

Here, the instance is created and the code is submitted, and the RunID is obtained, which is the remote record ID. As mentioned above, a record will be generated after submission, which is better and can be captured directly. Of course, if it cannot be captured, it is a submission error. Of course, capture is an endless loop, constantly querying the status, and then updating the local records.

As mentioned above, there is a question about how to determine which record is your current record. this solution is as follows:

1. an account is a separate queue, and one is submitted each time;

2. each query only queries the records submitted by this account, not all;

3. add a comment to the code, which contains an absolute ID to capture and match all source codes.

Here 3 is theoretically redundant for the first two, as long as you grasp the first one. However, because every time a page is crawled, this mechanism is added by the way, and insurance is the most important.

Release date: May 4th, 2016 at pm

Last edit time: May 4th, 2016 at pm

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