"webread" does not work for Yahoo Option Chains page

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Cengiz Esmersoy
Cengiz Esmersoy 2024-8-4
移动：Walter Roberson 2024-10-31，15:53
Going to any Yahoo Option Chain page, copy and paste the URL to webread returns an error. For example:
webread('https://finance.yahoo.com/quote/AAPL/options/')
returns
The server returned the status 404 with message "Not Found"
It works for stock prices, but not for option chains. Is this a Yahoo protection issue or a limitation of webread?
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Walter Roberson
Walter Roberson 2024-8-6
Access blocks would typically be error 403, Access Prohibitted.
Adriano
Adriano 2024-10-31，11:59
移动：Walter Roberson 2024-10-31，15:53
I get this error message:
Error: The server returned the status 404 with message "Not Found" in response to the request to URL https://finance.yahoo.com/quote/AAPL/options/.

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回答（1 个）

Kanishk
Kanishk 2024-8-13
Hi Cengiz,
It seems that when trying to use ‘webread’ to access the Yahoo Finance options page ‘404 Not Found’ error is encountered.
The issue appears to be related to the "User-Agent" field in the HTTP request. Some servers, including Yahoo Finance, selectively block requests from certain clients if the "User-Agent" field is not set or is set to an unrecognized value.
Although the field is not mandatory in HTTP requests, to resolve this issue, you can specify the "User-Agent" in the ‘webread’ request to mimic a web browser using ‘weboptions’.
Please follow the below code snippet to resolve the error:
url = 'https://finance.yahoo.com/quote/AAPL/options';
% Set the web options with a User-Agent to mimic a web browser
options = weboptions('UserAgent', 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3');
try
data = webread(url, options);
% Save retrieved page in HTML file
fid = fopen('AAPLOptions.html','w');
fprintf(fid, '%s\n',data);
fclose(fid);
catch err
disp(['Error: ', err.message]);
end
I was able to resolve the above error following the above steps.
The ‘User-Agent’ property of your browser can be found here
https://www.whatismybrowser.com/detect/what-is-my-user-agent/
Please go through the following documentation pages to learn more about ‘webread’ and ‘weboptions’:
Hope this helps!
Thanks
Kanishk

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