使用Ocamlnet 3的正确方法 - Http_client.Convenience.http_post [英] The correct way to use Ocamlnet 3 - Http_client.Convenience.http_post
问题描述
我正在尝试使用 Http_client.Convenience.http_post 来制作 http post请求。
API非常简单：
val http_post：string - >（string * string）list - > string
请求具有给定URL的POST请求并返回响应
正文。该列表包含使用POST请求发送的参数。
我想做什么是建立一个 http post 请求，通过 google flight 获取航班信息，解释为第1部分在这里：。
OCamlnet中的Convenience模块也会将数据作为application / x-www-form-urlencoded发送，但我认为您需要按原样发送数据。你可以使用 Http_client.post_raw 。
I am trying to use Http_client.Convenience.http_post to make a http post request.
The API is fairly simple:
val http_post : string -> (string * string) list -> string
Does a "POST" request with the given URL and returns the response body. The list contains the parameters send with the POST request.
What I wish to do is to construct a http post request to get the flight information via google flights, explained as part 1 in here: http://www.nohup.in/blog/using-json-google-flights
To maintain the format of the Post request, I took a screenshot as this:
So finally, I construct a Http_client.Convenience.http_post for it:
open Http_client.Convenience;;
let post_para = [("(Request-Line)", "POST /flights/rpc HTTP/1.1");
("Host", "www.google.com");
("Content-Type", "application/json; charset=utf-8");
("X-GWT-Permutation", "0BB89375061712D90759336B50687E78");
("X-GWT-Module-Base", "http://www.google.com/flights/static/");
("Referer", "http://www.google.com/flights/");
("Content-Length", "275");
("Cookie", "PREF=ID=2dc218fc830df28d:U=29aaf343dd519bca:FF=0:TM=1307225398:LM=1308065727:GM=1:S=RWC3dYzVvVSpkrlz; NID=52=VTp1QILW1ntPlrkLx7yLUtOYhchNk35G4Lk35KBd7A3lCznVV5glz7lwDoDP2RkjtTJVNZSomv3iffPqiJz4oXfpoph3ljb2eInGOe-FwosvrmSXPpnLkEWxMHIbuaid; S=travel-flights=YFCjkd9M9h3Z_uEqBmgynA");
("Pragma", "no-cache");
("Cache-Control", "no-cache");
("data", "[,[[,\"fs\",\"[,[,[\"SJC\"]\n,\"2012-04-05\",[\"EWR\",\"JFK\",\"LGA\"]\n,\"2012-04-12\"]\n]\n\"]],[,[[,\"b_ca\",\"54\"],[,\"f_ut\",\"search;f=SJC;t=EWR,JFK,LGA;d=2012-04-05;r=2012-04-12\"],[,\"b_lr\",\"11:36\"],[,\"b_lr\",\"1:1528\"],[,\"b_lr\",\"2:1827\"],[,\"b_qu\",\"3\"],[,\"b_qc\",\"1\"]]]]")];;
let search () = try (http_post "http://www.google.com/flights/rpc" post_para) with
Http_client.Http_error (id, msg) -> msg;;
let _ = print_endline (search());;
When I run it, it just give me the following error html page:
<HTML>
<HEAD>
<TITLE>Internal Server Error</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF" TEXT="#000000">
<H1>Internal Server Error</H1>
<H2>Error 500</H2>
</BODY>
</HTML>
Can anyone tell me why? What's wrong with my http_post?
Drop this from post_para, it is not an HTTP Header, OCamlnet will send that automatically for you: "(Request-Line)", "POST /flights/rpc HTTP/1.1".
To send the headers and POST data separately you need to set the headers use set_request_header on the http_call object.
Also the Convenience module in OCamlnet will send the data as application/x-www-form-urlencoded, but I think you need the data sent as is. You can do that by using Http_client.post_raw.
这篇关于使用Ocamlnet 3的正确方法 - Http_client.Convenience.http_post的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
