Error message Forbidden when using webread in Matlab

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Marcus 2022-6-30

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1751195-error-message-forbidden-when-using-webread-in-matlab

评论： Marcus 2023-9-25

采纳的回答： Marcus

I try to download data from this site:

https://fragmentation.fidessa.com/fragulator/

I have ISIN numbers that I want to download data for. Here I will use the example BMG0451H1170.

When I do it manually it looks like I can do this in two steps:

Step 1:

Go to page

https://data.fidessa.com/FragPro2/StockSearch?term=BMG0451H1170

Get the code 0RBA.L

Step 2:

Go to page

https://data.fidessa.com/FragPro2/fragBreakdownHistory?fim=0RBA.L&start=20210630&end=20220629&global=Y&format=json

Get the data

However, I encounter the following problem when I try to use webread:

When I use

url='https://data.fidessa.com/FragPro2/StockSearch?term=BMG0451H1170'

options = weboptions('Timeout', 5000, 'HeaderFields',{'Content-Type' 'application/json'},'UserAgent','');

searchResult=webread(url,options);

I get the following error message:

The server returned the status 403 with message "Forbidden" in response to the request to URL

The only information I’ve found about this suggested that I’d play around with the UserAgent. I did, but without success. I’ve also tried without the json option.

I get the same error message in step 2. I should use a POST request there, which may be part of the problem. However, in the first step a GET request seems to be enough.

I know I should only ask one question, so I would primarily be very grateful if somebody could help me get past the 403 error. If you have additional information on how I should use the POST request in step 2, I would also appreciate that very much.

Thank you for your help.

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Geoff Hayes 2022-7-1

编辑：Geoff Hayes 2022-7-1

@Marcus - a 403 error (to me anyway) means that you are not providing the proper (authroization) credentials along with your request. Or perhaps like you said, there are problems with the site.

See Troubleshooting RESTful API Errors for details.

Marcus 2022-7-1

Thanks! It was the cookie that was missing.

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采纳的回答

Marcus 2022-7-1

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1751195-error-message-forbidden-when-using-webread-in-matlab#answer_998180

I answer my own question. The only thing missing was a cookie:

options = weboptions('Timeout', 5000, 'ContentType','json',...

'KeyName', 'cookie', 'KeyValue', ['JSESSIONID=', sessionID]);

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Eric Machorro 2023-9-25

I have the exact same question/issue.

Marcus 2023-9-25

This was some time ago, but I think I got the sessionID by first visiting manually, and then getting the sessionID by inspecting that page. But again, it was some time ago, and I don't quite remember.

It was not a beautiful solution. :-)

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