base64

问题 I am trying to make an installer using batch. Of course, an installer needs to consist of files that will be installed, so I'm thinking of encoding the files in base64, and simply decode them and write them to their destination. Of course, my work would be very easy if Windows had something like the base64 tool that Linux boxes contain. However, since it's simply not there, is there any way to decode base64 content completely using batch files? And how would I accomplish this? Any help is

问题 Background This is a follow-up question to my original question Migrating from sun.misc.BASE64 to Java 8 java.util.Base64 because someone suggested that the Apache Commons Codec Base64 API is a drop-in replacement to migrate code which uses the sun.misc Base64 APIs. Question Is the org.apache.commons.codec.binary.Base64 a drop-in replacement for the unsupported, internal Java API sun.misc.BASE64Encoder and sun.misc.BASE64Decoder ? Drop-in replacement means that the encoding/decoding results

问题 I'm trying to convert a UIImage to a base64 string with the goal of uploading it to a back-end server. However, the conversion code I found in this article (which should be Apple's own implementation) generates an invalid string: Convert between UIImage and Base64 string After upload, I get this image: [Failty image that is decoded from iOS converted base64 1 Instead of this: [Correct image decoded from an online base64 conversion tool2 I tested the upload results using Postman and the back

问题 private static String encodeFileToBase64Binary(String fileName) throws IOException { File file = new File(fileName); byte[] bytes = loadFile(file); byte[] encoded = Base64.encodeBase64(bytes); String encodedString = new String(encoded,StandardCharsets.US_ASCII); return encodedString; } private static byte[] loadFile(File file) throws IOException { InputStream is = new FileInputStream(file); long length = file.length(); if (length > Integer.MAX_VALUE) { // File is too large } byte[] bytes =

问题 Introduction I have a base64 image string retrieved from a database: $imageBase64Str I need to retrieve the mime from this content and display the image. This is what the following code does: function imgMime($imgBytes){ if(is_null($imgBytes)){ return(false); } if(strlen($imgBytes)<12){ return(false); } $file = tmpfile(); if(!fwrite($file,$imgBytes,12)){ fclose($file); return(false); } $path = stream_get_meta_data($file)['uri']; $mimeCode=exif_imagetype($path); fclose($file); if(!$mimeCode){

问题 Introduction I have a base64 image string retrieved from a database: $imageBase64Str I need to retrieve the mime from this content and display the image. This is what the following code does: function imgMime($imgBytes){ if(is_null($imgBytes)){ return(false); } if(strlen($imgBytes)<12){ return(false); } $file = tmpfile(); if(!fwrite($file,$imgBytes,12)){ fclose($file); return(false); } $path = stream_get_meta_data($file)['uri']; $mimeCode=exif_imagetype($path); fclose($file); if(!$mimeCode){

问题 I need to get opportunity files from Salesforce and copy them to some folder. I am using .NET library for connecting to Salesforcre. I can get any data I want, except the [VersionData] field in [ContentVersion] table, which contains base64 data of the files I want. I can get the data with Workbench tool, but the only thing I get via .NET library is a link to file. I could create HttpClient with appropriate headers and invoke that URL, but I don't like to go this ways. Can I get the file via

问题 I have a SQL dump file that contains text with html links like: <a href="http://blahblah.org/kb/getattachment.php?data=NHxUb3Bjb25fZGF0YS1kb3dubG9hZF9ob3d0by5wZGY=">attached file</a> I'd like to find, decode and replace the base64 part of the text in each of these links. I've been trying to use Python w/ regular expressions and base64 to do the job. However, my regex skills are not up to the task. I need to select any string that starts with 'getattachement.php?data=' and ends with '"' I then

问题 Question Are the Java 8 java.util.Base64 MIME Encoder and Decoder a drop-in replacement for the unsupported, internal Java API sun.misc.BASE64Encoder and sun.misc.BASE64Decoder ? What I think so far and why Based on my investigation and quick tests (see code below) it should be a drop-in replacement because sun.misc.BASE64Encoder based on its JavaDoc is a BASE64 Character encoder as specified in RFC1521 . This RFC is part of the MIME specification... java.util.Base64 based on its JavaDoc Uses

问题 I'm trying to make a batch file from CMD with the following commands: Convert file to base 64 - using certutil command this is how the contents of the base 64 looks like (B64.txt): Trim the base 64 - basically, I want to remove -----BEGIN CERTIFICATE----- and -----END CERTIFICATE----- this part is done , the only thing left is trim the newline characters to make a one liner of base64, because I will be passing this to a request payload. This is what I did so far: @ECHO OFF cd /filePath