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How to check whether a string is Base64 encoded or not

I want to decode a Base64 encoded string, then store it in my database. If the input is not Base64 encoded, I need to throw an error. ...
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NodeJS: Saving a base64-encoded image to disk

My Express app is receiving a base64-encoded PNG from the browser (generated from canvas with toDataURL() ) and writing it to a file. But the file isn't a valid image file, and the "file" utility simply identifies it as "data". ...
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MFC中ComboBox控件的使用 - C/C++ - 清泛网 - 专注C/C++及内核技术

...ox对象 m_list为CImageList对象IDB_IMG 为16*(16*4)的位图,每个图片为16*16共4个图标*/ m_list.Create(IDB_IMG,16,4,RGB(0,0,0)); m_cbeWnd.SetImageList(&m_list); COMBOBOXEXITEMinsItem;insItem.mask=CBEIF_IMAGE CBEIF_TEXT;insItem.iItem=0;insItem.iImage=0;insItem.pszText="Line...
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Base64 encoding and decoding in client-side Javascript

...thods in JavaScript that could be used to encode and decode a string using base64 encoding? 13 Answers ...
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How to check for a valid Base64 encoded string

Is there a way in C# to see if a string is Base 64 encoded other than just trying to convert it and see if there is an error? I have code code like this: ...
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How to do Base64 encoding in node.js?

Does node.js have built-in base64 encoding yet? 7 Answers 7 ...
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Convert base64 string to ArrayBuffer

I need to convert a base64 encode string into an ArrayBuffer. The base64 strings are user input, they will be copy and pasted from an email, so they're not there when the page is loaded. I would like to do this in javascript without making an ajax call to the server if possible. ...
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How can you encode a string to Base64 in JavaScript?

I have a PHP script that can encode a PNG image to a Base64 string. 26 Answers 26 ...
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Convert Base64 string to an image file? [duplicate]

I am trying to convert my base64 image string to an image file. This is my Base64 string: 8 Answers ...
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How do I do base64 encoding on iOS?

I'd like to do base64 encoding and decoding, but I could not find any support from the iPhone SDK . How can I do base64 encoding and decoding with or without a library? ...