base64

Create data URIs on the fly?

为君一笑 提交于 2019-12-22 04:33:15
问题 Is there a script (javascript / client side). That create data URIs on the fly. Now i create data URIs with a online base64 creator. And then put that output in the css file. But when i changing the images. Its a lot of work to do it. Is there a script, that can do it for me.? 回答1: The modern browsers now have good support for base64 encoding and decoding. There are two functions respectively for decoding and encoding base64 strings: atob() decodes a string of base-64 data btoa() creates a

How to convert sun.misc.BASE64Encoder to org.apache.commons.codec.binary.Base64

天涯浪子 提交于 2019-12-22 04:19:20
问题 I have the following code for sun.misc.BASE64Encoder : BASE64Decoder decoder = new BASE64Decoder(); byte[] saltArray = decoder.decodeBuffer(saltD); byte[] ciphertextArray = decoder.decodeBuffer(ciphertext); and would like to convert it to org.apache.commons.codec.binary.Base64 . I've gone through the APIs, the docs, etc., but I can't find something that seems to match and give the same resulting values. 回答1: It's actually almost the exact same: Base64 decoder = new Base64(); byte[] saltArray

python3 人脸识别

会有一股神秘感。 提交于 2019-12-22 04:16:05
需要一张名为2.png的图片 1.在cmd中下载baidu-aip 2.在cmd中运行 生成一个txt文件,点开就是数据 代码: import base64 from aip import AipFace from collections import OrderedDict # 导入OrderedDict类 import json APP_ID = '16374788' API_KEY = 'KZvxjNG1BI1eP4uubRADf9DT' SECRET_KEY = 'q1gIx1x0DU9shcBMrby0XDpvLG4yXhGL' client = AipFace ( APP_ID , API_KEY , SECRET_KEY ) def face_check ( img_data ) : """ 人脸识别demo :param img_data: 二进制的图片数据 :return: """ data = base64 . b64encode ( img_data ) image = data . decode ( ) imageType = "BASE64" """ 调用人脸检测 """ client . detect ( image , imageType ) """ 如果有可选参数 """ options = { } options [ "face_field" ]

How to check if a string is plaintext or base64 format in Node.js

北战南征 提交于 2019-12-22 04:05:21
问题 I want to check if the given string to my function is plain text or base64 format. I am able to encode a plain text to base64 format and reverse it. But I could not figure out any way to validate if the string is already base64 format. Can anyone please suggest correct way of doing this in node js? Is there any API for doing this already available in node js. 回答1: Encoding is byte level. If you're dealing in strings then all you can do is to guess or keep meta data information with your

JavaScript: save base64 string as file

扶醉桌前 提交于 2019-12-22 03:54:31
问题 I have a base64 string, file type. File type can be image, text or even pdf. I need to show download link and when user clicks it should start downloading as expected file. Concisely, server sends me file as base64 string, and I need to save it as file on browser. How can I save base64 string as file on browser? It would be best if solution works on IE9 also. 回答1: You can use download.js. download(base64String, filename, mimeType) 回答2: You can do this from js to download pdf. Use: document

Error when decoding certain Base64 strings, but not others

我与影子孤独终老i 提交于 2019-12-22 01:18:07
问题 To keep this simple, I'll only be encoding/decoding a single byte. If I encode the byte 127, I get the base64 string "fw==" which can be successfully decoded back to byte 127. If, however, I encode a byte ≥ 128, then even though I can produce a base64 string without error (for example, byte 128 gives the string "gA=="), I get an error when I try to decode it. Here's my code which can be copy-pasted into any Xcode playground to reproduce the problem: func stringToByteArray(string: String) ->

Why am I not getting my original string after compression and decompression?

霸气de小男生 提交于 2019-12-22 00:03:47
问题 I am currently trying to use the java.util.zip.* package to perform lossless compression/Decompression. And I have used apache's jar to encode and decode the String used as an argument in Base64 charset. Following in my code with two static methods one each for compression and one for decompression. import java.io.UnsupportedEncodingException; import java.nio.charset.Charset; import java.util.zip.*; import org.apache.commons.codec.binary.Base64; public class main { public String compress

python进行base64编解码

血红的双手。 提交于 2019-12-21 20:19:44
[转] 直接上代码 import base64 fin = open(r"D:\2.zip", "rb") fout = open(r"D:\2.x.txt", "w") base64.encode(fin, fout) fin.close() fout.close() fin = open(r"D:\2.x.txt", "r") fout = open(r"D:\2.x.zip", "wb") base64.decode(fin, fout) fin.close() fout.close() 另外 decode(input, output) Decode a file. decodestring(s) Decode a string. encode(input, output) Encode a file. encodestring(s) Encode a string into multiple lines of base-64 data. 来源: https://www.cnblogs.com/fatterbetter/p/4157659.html

webpack核心概念_(第三章)_使用loader打包静态资源(图片篇)

最后都变了- 提交于 2019-12-21 20:15:08
使用loader打包静态资源(图片篇) 上一节我们看到webpack 把图片名字被打包成了一个比较长的字符串。 如果我们想不变动图片的名字,怎么办? 这样的话我们需要对loader做一些额外的配置了。 在使用loader的时候,可以配置一些参数,放在一个options的配置项 比如说希望打包生成的名字形式跟之前图片的名字一致,后缀也一模一样 { test: /\.(jpg|png|gif)$/, use: { loader: "file-loader", options: { name: '[name].[ext]' } } }, 这样我们打包后的名字就不会变了 name: '[name].[ext]' 这种配置的语法,我们叫做placeholder,即占位符 file-loader对应的占位符有很多: [ext]: 表示原始文件的后缀 [name]: 表示原始文件的名字 [hash]: 表示打包出来后文件的hash值 name: '[name]_[hash].[ext]' 打包出来之后就是 也就是说不配置的时候,默认打包出的名字就是hash值 我们可以看到打包文件默认在dist文件下,我们想打包到dist下image文件下,要怎么做? 可以在这里配置一下 outputPath: 'images/' ,意思是遇到jpg结尾的模块,打包的时候

How can I base64-encode unicode strings in JavaScript and Python?

帅比萌擦擦* 提交于 2019-12-21 18:33:02
问题 I need an encript arithmetic, which encript text to text. the input text could be unicode, and the output should be a-z A-Z 0-9 - . (64 char max) and it could be decrypt to unicode again. it should implement in javascript and python. If there is already some library could do this, great, if there is not, could you tell me. Let me talk about why To cheat China Greate Fire Wall , and GAE https has been blocked at china. Angry for this damn goverment. 回答1: You might want to look at the base64