I have this Google Script function that uses the following JSON REST API:
function TESOURODIRETO() { let srcURL = "https://www.tesourodireto.com.br/json/br/com/b3/tesourodireto/service/api/treasurybondsinfo.json"; let jsondata = UrlFetchApp.fetch(srcURL);}This function was working fine days ago, but now it returns the following error:
Exception: Request failed for https://www.tesourodireto.com.brreturned code 403. Truncated server response:
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta htt...(use muteHttpExceptions option to examine full response)
Full HTML (using option muteHttpExceptions: true on UrlFetchApp.fetch()):
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#challenge-error-text{background-position:100%;padding-left:0;padding-right:34px}</style><meta http-equiv="refresh" content="390"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div id="challenge-error-title"><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "www.tesourodireto.com.br",cType: 'managed',cNounce: '76219',cRay: '8b6caaba8b6c4569',cHash: '50c0574b9612071',cUPMDTk: "\/json\/br\/com\/b3\/tesourodireto\/service\/api\/treasurybondsinfo.json?__cf_chl_tk=Z1rjPqvq_qDEPl46KoOiMrbWu6TCf13e_gLcd1PoU0Q-1724264738-0.0.1.1-5140",cFPWv: 'b',cTTimeMs: '1000',cMTimeMs: '390000',cTplV: 5,cTplB: 'cf',cK: "",fa: "\/json\/br\/com\/b3\/tesourodireto\/service\/api\/treasurybondsinfo.json?__cf_chl_f_tk=Z1rjPqvq_qDEPl46KoOiMrbWu6TCf13e_gLcd1PoU0Q-1724264738-0.0.1.1-5140",md: 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'#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === ''&& location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/json\/br\/com\/b3\/tesourodireto\/service\/api\/treasurybondsinfo.json?__cf_chl_rt_tk=Z1rjPqvq_qDEPl46KoOiMrbWu6TCf13e_gLcd1PoU0Q-1724264738-0.0.1.1-5140"+ window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>Notice this is a public JSON API, I am able to call it directly from browser without problems:
https://www.tesourodireto.com.br/json/br/com/b3/tesourodireto/service/api/treasurybondsinfo.json
I guess the domain started to block the calls from Google Script server.
I was wondering if there is any way to bypass/workaround it, calling this JSON API from another public REST API first, then calling this intermediate API on my Google Script function.
So the new code would be something like this:
function TESOURODIRETO() { let srcURL = "https://www.tesourodireto.com.br/json/br/com/b3/tesourodireto/service/api/treasurybondsinfo.json"; let intermediate_API = "<REST_API>" let jsondata = UrlFetchApp.fetch(intermediate_API + srcURL);}I tried to find an REST API to perform this workaround/bypass, but I am unable to find it.
UPDATE: Thank you all who commented/replied on this question. With the Full HTML added above, it is clear now the reason of this exception:
The public API is indeed trying to check if it is a human calling for it (Cloudflare platform). But this does not make sense at all, it goes against the concept of an API, right?
And I understand that the proper way to fix this would be to contact the API admin to change Cloudflare settings to allow the call from another application/google-script. But here is another problem: "www.tesourodireto.com.br" is basically the Brazilian treasury website, and the public service from this/my country is really bad on answering/resolving issues like this. We (the guys engaged on the original git:https://gist.github.com/lucashmsilva/9f4596f2924ac5c1eb0721c2c41dc257?permalink_comment_id=5162243#gistcomment-5162243) are already discussing/trying to contact the admin to try to solve this.
That is why I am trying to find a workaround/bypass for this problem.