jja*_*gga 5 amazon-s3 amazon-web-services amazon-cognito
在遵循此处的简单官方教程（从浏览器将照片上传到 Amazon S3（对未经身份验证的用户使用 Cognito））时，我收到错误“配置中缺少凭据”。如下所示，代码非常简单，但不知道为什么会发生错误，即使我认为我完全遵循了教程的先决条件。我很好奇何时出现错误消息“配置中缺少凭据”，以便我猜测原因。这是因为 AWS 发生了变化还是我做错了什么？\n如果您让我知道正确的答案或任何提示，我将非常感激。
\n\n<!DOCTYPE html>\n<html lang="en">\n\n<head>\n <meta charset="UTF-8">\n <meta name="viewport" content="width=device-width, initial-scale=1.0">\n <meta http-equiv="X-UA-Compatible" content="ie=edge">\n <title>Document</title>\n <script src="https://sdk.amazonaws.com/js/aws-sdk-2.255.1.min.js"></script>\n <script>\n var bucketName = \'mama-swedenhouse-resources\';\n var bucketRegion = \'ap-northeast-2\';\n var identityPoolId = \'ap-northeast-2:f4250b2e-5d77-4413-bc3a-34c4xxxxxxxx\'; //just hiding last 8 letters on this github issue \n\n AWS.config.update({\n region: bucketRegion,\n credentials: new AWS.CognitoIdentityCredentials({\n identityPoolId: identityPoolId\n })\n });\n\n var s3 = new AWS.S3({\n apiVersion: \'2006-03-01\',\n params: {\n Bucket: bucketName\n }\n });\n\n function uploadPhoto() {\n\n var files = document.getElementById(\'test-file-input\').files;\n if (!files.length) {\n return alert(\'Please choose a file to upload first.\');\n }\n var file = files[0];\n var fileName = file.name;\n\n s3.upload({\n Key: fileName + \' \' + Math.floor(Date.now()),\n Body: file,\n ACL: \'public-read\'\n }, function (err, data) {\n if (err) {\n console.log(err);\n return console.log(\'There was an error uploading your photo: \', err.message);\n }\n console.log(\'Successfully uploaded photo.\');\n });\n };\n </script>\n</head>\n\n<body>\n<section>\n <input type="file" name="test-file-input" id="test-file-input" accept="image/*">\n <button id="uplaod-btn" onclick="uploadPhoto();">\xec\x97\x85\xeb\xa1\x9c\xeb\x93\x9c</button>\n</section>\n</body>\n\n</html>\nError: Missing credentials in config\n at constructor.fail (aws-sdk-2.255.1.min.js:50)\n at constructor.validateStructure (aws-sdk-2.255.1.min.js:50)\n at constructor.validateMember (aws-sdk-2.255.1.min.js:50)\n at constructor.validate (aws-sdk-2.255.1.min.js:50)\n at constructor.<anonymous> (aws-sdk-2.255.1.min.js:49)\n at constructor.callListeners (aws-sdk-2.255.1.min.js:51)\n at constructor.emit (aws-sdk-2.255.1.min.js:51)\n at constructor.emitEvent (aws-sdk-2.255.1.min.js:50)\n at constructor.e (aws-sdk-2.255.1.min.js:50)\n at a.runTo (aws-sdk-2.255.1.min.js:52)\naws-s3-upload.html:48 There was an error uploading your photo: Missing credentials in config\n小智 2
让它正常工作，设置凭据如下：
AWS.config.region = 'REGION';
AWS.config.credentials = new AWS.CognitoIdentityCredentials({
IdentityPoolId: 'IDENTITY_POOL_ID',
});
希望这可以帮助！
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