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How to use JSL form of "POST" WEB data?

lwx228

After I learned to use JMP to download web page data, ga mother likes to use JMP to download web page data now, but it is more difficult to process the web page of POST.

Get expert help: how to download data using JSL in the following way:

POST http://listxbrl.sse.com.cn/companyInfo/showBalance.do HTTP/1.1
Host: listxbrl.sse.com.cn
Connection: keep-alive
Content-Length: 54
Accept: */*
Origin: http://listxbrl.sse.com.cn
X-Requested-With: XMLHttpRequest
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Referer: http://listxbrl.sse.com.cn/companyInfo/toCompanyInfo.do?stock_id=600007&report_period_id=5000

report_year=2018&stock_id=600007&report_period_id=5000

I can do it with VBA.

Thanks!

Accepted answers

Ryan_Gilmore

These lines of code,

query = Associative Array();
query["report_year"] = 2018;
query["stock_id"] = 600007;
query["report_period_id"] = 5000;

are used to construct the query parameter list in the URL, e.g.

report_year=2018&stock_id=600007&report_period_id=5000

In the original code I supplied, the code had

query["period_id"] = 5000;

which would have given an incorrect query parameter list of

report_year=2018&stock_id=600007&period_id=5000

bryan_boone

Using example in the thread, you'd want something like:

query = Associative Array();
query["report_year"] = 2018;
query["stock_id"] = 600007;
query["period_id"] = 5000;

request = HTTP Request(
	Url( "http://listxbrl.sse.com.cn/companyInfo/showBalance.do" ),
	Method( "POST" ),
	Form( Fields(query) )
);

request << Send;

The Form message has been there since the beginning.

It has Fields and Files sub parts to it. Both are associative arrays.

In the "Fields" case it's name/value pairs where the value can be either character or a List of characters.

In the "Files" case it's name/value pairs where the value can be either filename or a List of filenames.

If only "Fields" is used, then the request header is automatically set to application/x-www-form-urlencoded

If "Fields" and "Files" (or just "Files") is used, then the request header is automatically set to multipart/form-data.

I'll update the thread with this information, too.

All comments

lwx228

I searched for-
Method("POST")
in the help file 、but found no similar code.

lwx228

Below is the VBA code, can be downloaded to get the page data.
But I still haven't been able to convert it into JSL code.

Please give me help.Thank you very much!

VBA:

Sub Main()
    Dim strText As String
    With CreateObject("MSXML2.XMLHTTP")
        .Open "POST", "http://listxbrl.sse.com.cn/companyInfo/showBalance.do", False
        .setRequestHeader "Content-Type", "application/x-www-form-urlencoded"
        .Send "report_year=2018&stock_id=600007&report_period_id=5000"
        strText = .responsetext
        Debug.Print strText
    End With
    Cells(1, 1) = strText
End Sub

Ryan_Gilmore

I think the following might be close to what you need,

request_headers = Associative Array();
request_headers["Content-type"] = "application/x-www-form-urlencoded";
	
query = Associative Array();
query["report_year"] = 2018;
query["stock_id"] = 600007;
query["period_id"] = 5000;

request = HTTP Request(
	Url( "http://listxbrl.sse.com.cn/companyInfo/showBalance.do" ),
	Method( "POST" ),
	Headers( request_headers ),
	QueryString( query )
);

lwx228

Thank Ryan_Gilmore !

This approach still hasn't worked.

It seems that this form of POST method, JMP application is not yet.

Ryan_Gilmore

Once the request has been created. you then need to issue the Send command, e.g.

data = request << Send;
If( request << IsSuccess,
    json_data = Parse JSON( data );
);

lwx228

My knowledge of the JMP approach is limited.
I can only imitate.Still no results.

Thank Ryan_Gilmore!