base64

问题 I have a string that I'm encoding into base64 to conserve space. Is it a big deal if I remove the equal sign at the end? Would this significantly decrease entropy? What can I do to ensure the length of the resulting string is fixed? >>> base64.b64encode(combined.digest(), altchars="AB") 'PeFC3irNFx8fuzwjAzAfEAup9cz6xujsf2gAIH2GdUM=' Thanks. 回答1: Looking at your code: >>> base64.b64encode(combined.digest(), altchars="AB") 'PeFC3irNFx8fuzwjAzAfEAup9cz6xujsf2gAIH2GdUM=' The string that's being

问题 using nodejs I am trying to generate an unique URL for user to conform email address . From that URL user will be able to verify the email account by decrypting the ciphertext and comparing ciphertext data with database . I am using CryptoJS to generate the url. let url = 'http://localhost:4000/newUser/get/'+ciphertext ; Problem is that in ciphertext, it contains forward slash " / " eg: http://localhost:4000/newUser/get/U2FsdGVkX189ZNKKQrYgqU90DDwkl/W3hRTSGO1yvUMaDilPJmz9YYI3d1/E3i9C Router

问题 In Delphi 10.4, I have sucessfully saved a valid TPicture base64-encoded to an INI file, using this code: procedure TForm1.SavePictureToIniFile(const APicture: TPicture); // https://stackoverflow.com/questions/63216011/tinifile-writebinarystream-creates-exception var LInput: TMemoryStream; MyIni: TMemIniFile; Base64Enc: TBase64Encoding; ThisFile: string; begin if FileSaveDialog1.Execute then ThisFile := FileSaveDialog1.FileName else EXIT; //CodeSite.Send('TForm1.btnSaveToIniClick: VOR

问题 I am encoding my images in Base64 before uploading them to the server. I need to get their file sizes down to a specific size (500kB). I have tried to get the ratio between the original and the desired file size and reducing de height and width accordingly. But it does not work. Any help? 回答1: Some other users had the same question. Maybe this helps you: JavaScript reduce the size and quality of image with based64 encoded code As far as i'm concerned, there is no way to reduce the filesize of

问题 In my Android app build.gradle android { compileSdkVersion 27 defaultConfig { minSdkVersion 16 targetSdkVersion 27 ... } .... } Kotlin code val data = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { Base64.getDecoder().decode(str) } else { Base64.decode(str, Base64.DEFAULT) // Unresolved reference: decode } Obviously, I got compilation error, when using Base64 variant prior to API 24. But how can I support all the API levels and use Base64 as before 24, as after? 回答1: Use android.util

问题 Simple yes or no question, and I'm 90% sure that it is no... but I'm not sure. Can a Base64 string contain tabs? 回答1: It depends on what you're asking. If you are asking whether or not tabs can be base-64 encoded, then the answer is "yes" since they can be treated the same as any other ASCII character. However, if you are asking whether or not base-64 output can contain tabs, then the answer is no. The following link is for an article detailing base-64, including which characters are

问题 Simple yes or no question, and I'm 90% sure that it is no... but I'm not sure. Can a Base64 string contain tabs? 回答1: It depends on what you're asking. If you are asking whether or not tabs can be base-64 encoded, then the answer is "yes" since they can be treated the same as any other ASCII character. However, if you are asking whether or not base-64 output can contain tabs, then the answer is no. The following link is for an article detailing base-64, including which characters are

问题 I am using the Gmail API in Python 3 to send emails with attachments, based on their example code I've got the following to create the message: def create_message_with_attachment( sender, to, subject, message_text, files): """Create a message for an email. Args: sender: Email address of the sender. to: Email address of the receiver. subject: The subject of the email message. message_text: The text of the email message. file: The path to the file to be attached. Returns: An object containing a

问题 I am using the Gmail API in Python 3 to send emails with attachments, based on their example code I've got the following to create the message: def create_message_with_attachment( sender, to, subject, message_text, files): """Create a message for an email. Args: sender: Email address of the sender. to: Email address of the receiver. subject: The subject of the email message. message_text: The text of the email message. file: The path to the file to be attached. Returns: An object containing a

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . Improve this question The permissions in the directories in which I am working are frequently too convoluted to use scp efficiently, so to copy files/folders between ssh sessions I've decided to cobble together tar and base64 for a ghetto solution. However, for some reason I'm getting