Tostring base64 javascript. from('This is a buffer example.

base64. toString ('base64')". Jun 4, 2021 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Nov 13, 2017 · Neither the accepted answer nor the Buffer methods worked for me. It has the exact same implementation as String. So it may be used for APIs, not for client side code. The Math. The . 1. The second argument to Buffer. name, 'base64'); fs. Always handle errors: The btoa() function and Buffer. replace different special characters. And this atob() method decodes the above Base64 string and returns the original output. 5,525 2 30 27. Jul 5, 2022 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. mode. Base64 エンコード を行う btoa 関数は文字列を引数として渡しますが、その 文字列の文字 1 May 31, 2018 · Instead they get the 64 character hex string and base64 encode that to get 88 characters!! strange design decision!! So, your code should do the same. 4. Here is how you encode it on the Java side: in Java 7 using Google guava's com. First, you'll need to install the request module using npm: Window: btoa () メソッド. Here are few of the examples. These methods atob() and btoa() are used to convert to string and base64 format respectively. This btoa() method simply encodes or creates the Base64 ASCII string from the given file or object. toString('base64'); // send through websocket. The output of the above code will be a base64 string-. Nov 27, 2020 · const resInBase64 = res. prototype. data) looks weird. Oct 11, 2023 · Buffer. For example, if you create a buffer from a string using Buffer. hex_hmac(apiSecret, data), 'utf-8'). Feb 1, 2018 · Yes, I see - so, request and got get the same result as each other, so, they both get it "wrong" in the exact same way - converting the first 80 or so characters from base64 to binary should help you see where they are going wrong Oct 5, 2021 · JavaScript provides two methods to do a base64 encoding and decoding. Example 1: Encode a String to Base64 Using btoa() Mar 24, 2022 · Image is a Canvas element. Aug 19, 2023 · In Node. If you assume the bytes represent a single number you can represent the sequence of bytes as a base 64 string. atob( String ) Parameter (String): This parameter is required. Then we convert the Buffer to a string (you can throw in a hex or base64 encoding if you want). So, plus to minus, and the forward slash "lies down" to become an underscore. ZeroPadding)}) Nov 18, 2021 · Pass the value you want to base64-encode as the first argument and the current encoding as the second argument. Javascript provides a built-in function named btoa () (binary-to-ASCII) to perform Base64 encoding. Apr 7, 2020 · Base64 Decoding. btoa() method to encode and transmit data which may otherwise cause communication problems, then transmit it and use the atob() method to decode the data again. arrayBuffer());. log. Now I have a string of a MD5 hex digest for a file, and I want to convert it to base64 in order to use the Content-MD5 HTTP header when uploading it. toString('base64') edited Jul 23, 2020 at 17:27. onreadystatechange = function() {. toString('base64'); Share. Copy. hatenablog. btoa paulownia. var str = 'VGhpcyBpcyBhbiBhd2Vzb21lIHNjcmlwdA=='; // make URL friendly: str = str. test('fuel') === true as fuel is a perfectly valid encoded base64 string that decodes to ~ç¥. For example, the reverse operation would look like this Nov 11, 2021 · Buffer. toString('base64') Share. Aug 19, 2021 · Is this the same issue: base64 - How to encode base 64 string in ReactJS when btoa is deprecated?. These are btoa and atob. Under the hood, the Buffer handles all the binary to base64 mapping and conversion for you. 1 It is therefore not possible to directly encode text as Base64. parse(encryptedText) doesn't give you back a Base64 string, but an object, you should use it with toString like this: CryptoJS. 1. Syntax Buffer. If I am reading this correctly, the demand was for converting NUMBERS between bases. I suggest converting the array to a buffer and then encoding as base64: Buffer. If you take a and directly encode it to Base64, then it is probably assumed that a is already a string (e. You are telling Buffer. btoa: btoa method takes one binary string and converts it to a Base64 encoded string. Approach: Canvas (for legacy browsers) Load the image into an Image-Object, paint it to a nontainted canvas and convert the canvas back to a dataURL. See full list on stackabuse. write() - third argument is not length, it is end offset - no, for write it is a length - see documentation - you could actually do buffer. – NFTX. js and server-side frameworks like Expressjs. BaseEncoding and com. The resulting binary data is a reconstruction of the original binary data encoded to Base64. toString() は、 "[object Type]" を返し、 Type のところがオブジェクト型になります。. toString('base64') Edit: Apparently it describes itself as a buffer despite not actually offering a node. But please show more of your code, it's not really clear where record comes from and what database library you Jun 3, 2015 · HEX to Base64 converter for JavaScript (5 answers) Closed 9 years ago . Here is what it looks like: Oct 22, 2011 · @swateek Works for me: base64regex. The toString() method is used internally by JavaScript when an object needs to be displayed as a text (like in HTML), or when an object needs to be used as a string. toString('base64')); Can you share other part of nodejs code, How are you handling request in middleware or before accessing req. from() method takes a string as an input and converts it into Base64. from(base64, 'base64'); const text = buffer. Buffer. from("4pyTIMOgIGxhIG1vZGU=", "base64"). Jan 31, 2018 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Pure JS - no string middlestep (no atob) I write following function which convert base64 in direct way (without conversion to string at the middlestep). replace(/\+/g, '-'). like. Follow Practicing politeness in JavaScript code 🤬 Feb 7, 2019 · NodeはBufferにbase64エンコード機能があるのだが Buffer. js Buffer object. js, we can use the Buffer. from method to convert the base64 string to a buffer. Asking for help, clarification, or responding to other answers. , a string in which each character in the string is treated as a byte of binary data). pass the char transformed string into obbtoa : btoa the string. Namely, a "+" is replaced with a "-" and a "/" is replaced with a "_". I’m glad that 1. In the code below, we are going to create an SHA-256 hash using the default In JavaScript, it is possible to use Base64 to encode and decode strings. Mar 3, 2015 · I'm trying to read an image from client side encoded in base64. btoa() goes from a string to a base64-encoded string, and atob() decodes back. 我们还 The alternative Base64 encoding called Base64url simply replaces those 2 troublesome characters with two safe characters. Base64) then you get the Base64-encoded string of the binary result. The btoa() method of the Window interface creates a Base64 -encoded ASCII string from a binary string (i. const buffer = Uint8Array. Converting SHA-256 to base64 in Node. log(data); Depends on if the client requires the complete png picture to Jul 20, 2021 · 1. toString(CryptoJS. I have seen precisely ZERO answers to the question. Apr 21, 2014 · Anyone know of a good snippet of JavaScript code to convert HEX encoded strings to base64 encoded strings? 'hex'). body. I feel like I'm missing something because I can't can it working. All you need to do is create a buffer from the Base64 encoding string by using base64 as the second parameter to Buffer. – Jaromanda X. toString('base64') and to decode it just use. stringify(obj), 'ascii'); new Buffer(objStr, 'base64'). marksyzm. stringify(bufferOne); How to Encode and Decode Strings with Base64 in JavaScript. Here's what worked as of January 2019: yarn add react-native-base64. toString(); // ' à la mode' The toString method of Buffer defaults to utf8, but you can specify any desired encoding. from (), the toString () function gives you the original Jun 3, 2024 · Window: btoa () method. random() method. You can convert this random number to a string and then remove the trailing zeros: The above code will generate a random string Aug 29, 2009 · This will generate a random string of 4 or 5 characters, always diferent. result from the getBase64() function (rather than using console. I'm encrypting a string in a web application using CryptoJS (v 2. charCodeAt(0)) And then if you really need a string, you can use a TextDecoder, which Jan 8, 2019 · For NodeJS (with node-fetch), you can get a buffer from blob using Buffer. toString(encoding) Parameters. If you print result. imgs[i]). print Empty=base64_decode_tostring("U3RyaW5n0KHR0tGA0L7Rh9C60LA=") Output. Dec 15, 2021 · I'm trying to take a Base64 string, convert it to a hex string and group the output by bytes. stringify({"hello":"world"},undefined,n)). The following shows a quick example: // A really plain string that is just code points below 128. This is example of converting String to a Buffer and back to String: let bufferOne = Buffer. write(slugId2, SLUGID_SIZE, 'base64'); - because the length defaults to buffer. How to Encode and Decode HTML Base64 using JavaScript Aug 21, 2020 · Node. from(choice. then. toString(); We're just extracting the ArrayBuffer from the Uint8Array and then converting that to a proper NodeJS Buffer. However, you don't need to get a blob from node-fetch. toString('base64'); not sure if there's a better way in node to convert hex encoded string to base64, but that works Dec 27, 2015 · I looked there first, but skipped straight to the "toString()" section, thinking it'd have at least a link to the encoding it supported. toString('ascii') As far as it goes to your code, its not wrong base64 conversion is right, may be there can be issue in your temporary_user_id, because of that you are getting some awkward text but conversion is done right 'base64': Base64 encoding. javascript; node. readFile May 23, 2022 · It is a Data-URL in which the data part is provided in form of a Base64 encoded string. Unicode 文字列も結果的にバイナリデータとして扱うため、バイナリデータを Base64 エンコードする方法を先に説明します。. toStringTag プロパティがある場合、その値が Type として使用されます。. It is conceptually always a two step procedure: convert string to bytes (using some character encoding) encode bytes as Base64. toString("base64") method may throw errors if the input string contains characters that cannot be represented in Base64. from('someText'). 3), and I need to decrypt it on the server in Python, so I'm using PyCrypto. You can use the Window. Syntax: window. The String object overrides the toString method of Object; it does not inherit Object. log(bufferOne); // Output: <Buffer 54 68 69 73 20 69 73 20 61 20 62 75 66 66 65 72 20 65 78 61 6d 70 6c 65 2e>. The response you got originally ( {type: 'Buffer', data: Array(215499)}) makes it look like choice is a buffer already - you should then need only const base64String = choice. toString(). The toString() method is used for converting the Base64 buffer back into the string format. something that worked here for me was these two simple functions: b64encode = function(x) {. com ブラウザにはbtoaというbase64エンコードを行う関数がある。しかしこいつはascii文字列またはBinary Stringしか Feb 8, 2023 · Base64 decoding is the reverse process of encoding. const buffer = Buffer. Data = Buffer. let json = JSON. Kusto. encrypt('1234567890123456', '1234567890123456', {mode: new Crypto. How can I base-64 encode JSON and safely decode it back to its original value? Jun 3, 2023 · Encoding Base64 in JavaScript Using the btoa() Function. Example 1: This examples encodes the string “This is GeeksForGeeks Jun 4, 2015 · Base64 is a binary-to-text encoding, a sequence of bytes is encoded as a sequence of ASCII characters. pad. JavaScript 具有将图像 URL 或图像从本地 PC 转换为 base64 字符串的约定。. Files:. Oct 23, 2020 · There are many ways available to generate a random string in JavaScript. Aug 16, 2021 · The Buffer. . from to expect the input USERNAME:PASSWORD to be a base64-encoded string, but this is wrong: the input clearly is not base64-encoded (not least because it includes a colon, which not a valid base64 character). common. from(). In both ways the first part generate a random number. from(str, 'base64') andbuf. google. buffer. The quickest way is to use the Math. Aug 5, 2017 · 1. toString('base64') 3 likes Like Reply Ovidiu Miu. Improve this answer. apply() nele, passando o objeto que quer inspecionar como o primeiro parâmetro, chamado thisArg. toString("base64"); – Rowland. var buff = Buffer. Dec 14, 2019 · Beware it's not the same as converting "to an UTF-8 string", since JavaScript only supports UCS-2 and UTF-16 strings. from(str, 'base64') and buf. replace(/\=+$/, ''); // reverse to original encoding. To encode the data, you have to regroup the bits in the bytes into six bit groups, then you can convert each group into a base64 character. from(base64data, 'base64'). How to read with nodejs? My code: // add to buffer base64 image var encondedImage = new Buffer(image. stringify(json); const objJsonB64 = new Buffer(objJsonStr). Follow edited Dec 14 Base64 is a group of binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation. log(dataURL); const base64 = getBase64StringFromDataURL(dataURL); console. toString('ascii') !== objStr I'm trying to keep this as simple as possible. It accepts the binary string as an argument and returns a Base64 encoded ASCII string. toString('base64'). byte[] data Dec 14, 2018 · // Binary string to ASCII (base64) function btoa(bin) { return Buffer. Mar 7, 2019 · 15. from(sha256. May 28, 2024 · This method decodes a base-64 encoded string, which has been encoded by the btoa () method. const stringToEncode = 'foobar'; const encodedString = btoa( stringToEncode); // 'Zm9vYmFy'. imgs. 3. See: Base64 5 days ago · The ArrayBuffer object is used to represent a generic raw binary data buffer. from(store. For String values, the toString method returns the string itself (if it's a primitive) or the string that the String object wraps. When creating a Buffer from a string, this encoding will also correctly accept "URL and Filename Safe Alphabet" as specified in RFC 4648, Section 5. Every JavaScript object has a toString() method. The converted bytes can be changed again into String. There are a lot of places where base64url encoding / decoding are already Well, you could just use any Javascript Base64 library: perhaps this question answers it? EDIT: Binary data is essentially just a sequence of bytes. By default the canvas outputs to a lossless PNG, we can pass 'image/png', 'image/jpeg' or 'image/webp' to toString() pode ser usado com qualquer objeto e permite que você determine sua classe. from(string, 'binary'). js APIs, converting between base64-encoded strings and binary data should be performed using Buffer. In case you are looking for a JavaScript on the frontend (Javascript, React. The toString() method can be used to convert a string object into a string. Oct 17, 2023 · The core functions to base64 encode and decode in JavaScript are btoa() and atob() . The btoa() function is a built-in JavaScript function that takes a binary string as an argument and returns its Base64-encoded equivalent. js. the y is prepended to the result string so the decoding can know both the t and y. Jul 17, 2020 · So you should use simply store. io. The Node generated base64. from(JSON. from with the rawData base64 string and 'base64' to convert the rawData Feb 28, 2014 · 1. For instance, we write: to call Buffer. This nitpick passed, there are many methods to do the same as this code in a browser. You can just get a buffer directly from the response. encode('Some string to encode to base64'); edited Nov 9, 2022 at 13:40. The btoa() method creates a base-64 encoded string from a String object in which each character in the string is treated as a byte of binary data. e. log(base64); </script>. replace(/\//g, '_'). toString() com qualquer objeto, deverá chamar Function. js. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more. js buffers are objects that store arbitrary binary data. original = user1:password-goes-here! decoded = user1:password-goes-here! ちゃんと、エンコードした文字列から元の文字列に戻ったことが確認できました Apr 6, 2021 · const base64data = Buffer. toString(36) part cast the number to a base36 (alphadecimal) representation of it. toString("base64") n = 1 to 10 (Spacing) answered Oct 21, 2020 at 10:46. Using atob() and btoa() in Javascript. It takes a Base64 encoded string and maps each character back to its 6-bit binary representation. toString() to get back your original string that was encoded in Base64 Dec 1, 2023 · When encoding a string to Base64 in JavaScript, keep the following best practices in mind: 1. You can use this method to encode data which may otherwise cause communication problems, transmit it, then use the Window. Oct 10, 2022 at 16:09. enc. To get an idea of the reversal: 1. console. May 15, 2013 · The base64 encoded data contains six bits of information per character, so the eight bits of a character code is spread out over two characters in the encoded data. const asciiString = 'hello'; // This will work. buffer を利用して Base64 のエンコードおよびデコードを行う例は次の通りです。. Jul 31, 2020 · The more effective (see below) option would be, if your LZ library supports it, to not interpret the base64-encoded buffer as a string and pass it to the library as a Uint8Array directly. Whitespace characters such as spaces, tabs, and new lines contained within the base64-encoded string are ignored. As you can see, it only takes a few lines of code to seamlessly convert between raw strings and base64 encoded strings. There no magic involved, just identify the file type, create the first part ( data:image/png;base64, ) and concatenate the Base64 string. Finally, we log the resulting Base64 string. You do not want to convert the stream into a string but its readable chunk: var string = stream. Base64. random() method returns a random number between 0 (inclusive), and 1 (exclusive). It is supported in modern browsers and can be used to encode strings as follows: May 27, 2011 · Once started on the folder that contains the picture to transform, open the url in browser and using developer console you can convert the image to base 64. Jan 8, 2024 · Trying to decode a base64 string that was generated from invalid UTF-8 encoding returns null: Run the query. // D some business logics here if you receive Jun 3, 2024 · The atob() method of the Window interface decodes a string of data which has been encoded using Base64 encoding. toString("base64") ブラウザのJSにはこういう便利な実装がないのだった。どうするか？ window. Make sure to handle these errors gracefully using try-catch blocks or Aug 7, 2021 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Aug 30, 2017 · 226 1 6. Example output is like 30jzm or 1r591 or 4su1a. the string to encode. Today we use Bearer token more often that Basic Authentication but if you want to have Basic Authentication first to get Bearer token then there is a couple ways: const request = new XMLHttpRequest(); request. 该字符串可以有大量的符号和字母。. parse(encryptedText). Nodejs - How to show qr-image result in view. NodeJS converting image stream to base64 gives invalid data. Expand table. By default, toString () converts the buffer to a string using UTF8 encoding. 据此实现就很简单了。 实现. このメソッドを For code running using Node. 10. I'd like the output of console. from(uint8arr. Sep 7, 2023 · 2. Base64 encoding using btoa() The btoa() function (stands for binary-to-ASCII) is used to create a Base64 encoded ASCII string from the binary data. I then base64 encode the string using new Buffer(str). " – W3Schools offers free online tutorials, references and exercises in all the major languages of the web. I completely missed the top section about encodings. It is an array of bytes, often referred to in other languages as a "byte array". PHP base64 Object. from(string, [encoding]) object. Para usar Object. valueOf() . オブジェクトに値が文字列である Symbol. Ovidiu Miu Ovidiu Miu. I have a GUID in string format e8b75aff-3422-4529-8a6a-15b33e674f48 and I need it in aBase64 string /1q36CI0KUWKahWzPmdPSA== How do I convert it? Thanks. We can use this method to do a Base64 encryption. atob Jul 13, 2024 · Description. I suspect you're looking for a function to tell if you're looking at an encoded or vanilla payload … but such a (non-AI based and fully deterministic) function does not exist, though i'd be delighted to be proven wrong. Decode them and do some trivial math on the bytes to get a number. js example. import base64 from 'react-native-base64'. Jan 20, 2012 · let str = Buffer. I'm reading file line by line using createInterface and then concatenate the strings. JavaScript 版： May 7, 2015 · Buffer. You can always prettify above code by providing some spacing, so that when some one decode it back to JSON String it would look good. js etc. toString('base64') // 'dXNlcm5hbWU6cGFzc3dvcmQ='. g. The btoa () method uses the “A-Z”, “a-z”, “0-9”, “+”, “/” and “=” characters to encode the string in base-64. log(new Buffer(req. 2. We convert the buffer to a Base64 encoded string using toString('base64'), which works the same way as in the Node. from (str, 'base64') andbuf. Since btoa only works with strings, we use it to convert the Base64-encoded string from the buffer to the final Base64 string. it looks like you are getting only name of file in console. from(bin, 'binary'). from indicates the input format of the first argument. from(atob(b64), c => c. For example, you can encode, transmit, and decode control characters such as ASCII values 0 through 31. read(). log(bufferString) to be: 03 67 00 cf 04 68 61 00 ff 01 2d Oct 29, 2008 · To make a Base64 encoded String URL friendly, in JavaScript you could do something like this: // if this is your Base64 encoded string. If we want to convert back to a Uint8Array from a string, then we'd do this: Jun 1, 2018 · Create qrCode with output base64 from javascript. js, Vue. toString('base64');. ,), implementation using cryptoJS module for JavaScript. toString('base64'); console. Base64 エンコード. from('username:password', 'utf8'). The code still works as expected, but I was wondering if it is safe to use atob or there is maybe some other solution which I am unaware of? Mar 29, 2016 · I tried to use return reader. Feb 27, 2023 · now, this is getting converted to base64, so that I can show it back as PDF file with the below method: so the param passing as buffer to arrayBufferToBase64 method is the data shown in the above image. Then we can call the buffer’s toString method with 'hex' to convert it to a hex string. May 30, 2018 · For code running using Node. com Feb 19, 2020 · There are two built-in functions in JavaScript for encoding and decoding raw binary data into Base64 strings. Dec 5, 2020 · I'm trying to encode an mp3 file to base64. const objJsonStr = JSON. It specifies the string which has already been encoded by the btoa () method. Oct 12, 2023 · 在 JavaScript 中使用 FileReader 将图像转换为 Base64 字符串. It returns an ASCII string that is the Base64 representation of console. The parameters are described below: When you call the toString() function on such an object, you get a Hex-encoded string of that binary object. Here's the JS: Crypto. Thanks! 5. result)) because i want to capture the base64 as a variable (and then send it to Google Apps Script). If we have a <canvas> that we want to turn into a Base64 string we can use toDataURL on the Canvas element. Here’s a code snippet translating a string in UTF8 encoding to base64: const encoded = Buffer. You cannot directly manipulate the contents of an ArrayBuffer; instead, you create one of the typed array objects or a DataView object which represents the buffer in a specific format Jun 30, 2016 · I have large Javascript objects which I would like to encode to base-64 for AWS Kinesis` It turns out that: let objStr = new Buffer(JSON. Jul 11, 2022 · For code running using Node. from("あいうえお", "utf-8"). Looks like Sam Axe answer will resolve the issue. toString('utf-8'); // Outputs original "Hello World" string. UTF-8 encoded Jun 15, 2020 · get the char code and add the index modulo t and get a String back from that char code. この実行結果は次にのようになります。. Are you concerned about the entire JSON returned or the data property? Since the returned object is in JSON format, you can stringify and convert to base64 encoded. Dec 25, 2023 · Encode a string with Base64. This Base64 data can then be embedded directly into an HTML image tag, allowing the image to be displayed within the web page without linking to an external file. log(reader. Provide details and share your research! But avoid …. Jul 15, 2014 · 0. Jul 30, 2023 · In the code below, we are going to create an SHA256 hash using cryptographyJS and then we use the btoa () method encodes a string in base-64. buffer). from() and then decode it to the UTF-8 string by using the toString() method. btoa() は Window インターフェイスのメソッドで、 Base64 でエンコードされた ASCII 文字列をバイナリー文字列（すなわち、文字列のそれぞれの文字がバイナリーデータの各バイトとして扱われる文字列）から生成します。. length - offset - in this case, it would be SLUGID_SIZE. call() ou Function. '); console. Sep 13, 2016 · Assuming you want the hexadecimal representation as a string, the window. js, converting an image URL to Base64 can be achieved using the request module along with the built-in Buffer class. I'm in a client-side, javascript context. btoa and atob work with strings, which they treat as arrays of bytes, so to use these two functions, you should first convert your array of integers (provided they fall in the range 0-255) into a string. The Base64 decoding process is very much similar to the encoding process. from('This is a buffer example. storeImage. open('GET', url, false, username,password) request. Normally, you will not use it in your own code. Sep 16, 2019 · First, actually CryptoJS. You can do that with. In this tutorial, you will learn how to encode a string to Base64 encoded format. Buffers have a toString () method that you can use to convert the buffer to a string. CBC(Crypto. 7. Map および Symbol を含む多くの組み込みオブジェクトに . atob function (available in most modern browsers) is your first step - it will convert your base64 string to an ASCII string, where each character represents one byte. The cleanest is to first decode this base64 string in an ArrayBuffer and then read that ArrayBuffer as string, just like your node code: 2. AES. from(await blob. In this article, you will be introduced to the btoa and atob JavaScript functions that are available in modern web browsers. Featured on Meta Upcoming initiatives on Jul 31, 2023 · This implementation is for Node. toString('base64'); } URL Safe Base64 If you're BigInts for JWKs you'll need to convert base64 to URL Safe Base64 and back as well. string('base64') The encoded base64 is incorrect with + signs at every line read (assumption) PHP base64 is working fine. It takes one parameter, i. Mar 8, 2023 · バイナリデータの場合. On MDN is says: "Note that btoa() expects to be passed binary data, and will throw an exception if the given string contains any characters whose UTF-16 representation occupies more than one byte. edited Mar 11, 2015 at 22:19. Jan 24, 2022 · To decode base64 to hexadecimal string with JavaScript and Node. You can also do this for the complete data running through the stream: data += stream. 我们将讨论创建一个 canvas 元素，将图像加载到其中，并使用 toDataURL 来显示字符串表示。. js; or ask your own question. However fancy, hacky, deferring and in some cases completely Big-O oblivious, all the answers go along the "for instance" path of adjusting the problem to the solution you can throw together. data). ap ae pa sm he eo bk rw bh yz