base64

vue中使用aes加密

由 ε祈祈猫儿з 提交于 2020-01-03 05:05:01
1、安装 npm install crypto-js 2、创建aes.js文件 我是放在src/utils/aes.js 3、aes页面引入方法 import CryptoJS from 'crypto-js/crypto-js' /* * 默认的 KEY IV 如果在加密解密的时候没有传入KEY和IV,就会使用这里定义的 * * 前后端交互时需要前后端密钥和初始向量保持一致 */ const KEY = CryptoJS.enc.Utf8.parse("1234567890ABCDEF");// 密钥 长度必须为16位 const IV = CryptoJS.enc.Utf8.parse("123456"); // 初始向量 长度随意 /* * AES加密 ：字符串 key iv 返回base64 */ export function encrypt(str, keyStr, ivStr) { let key = KEY let iv = IV if (keyStr && ivStr) { key = CryptoJS.enc.Utf8.parse(keyStr); iv = CryptoJS.enc.Utf8.parse(ivStr); } let srcs = CryptoJS.enc.Utf8.parse(str); var encrypt = CryptoJS.AES

Java cannot send email with html with images

由 北城余情 提交于 2020-01-03 04:42:07
问题 I am trying to send email with html which has two images. The two images are sent from the AngularJS client side as base64 strings and looks like: data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAA+gAAALuCAYAAAA9jTxNAAAgAElEQ Note that I have truncated the base64 string as its too long. String temp = baseString.split(",")[1]; byte[] tile = DatatypeConverter.parseBase64Binary(temp); BodyPart messageBodyPart = new MimeBodyPart(); InputStream inputStream = new ByteArrayInputStream(tile);

Replacing Base64 - Is http/https communication 8 bit clean?

由 ∥☆過路亽．° 提交于 2020-01-03 02:57:21
问题 Here is an overview of what 8 bit clean means. In the context of web applications, why are images saved as Base64? There is a 33% overhead associated with being 8 bit clean. If the transmission method is safe there is no need for this. But basically, my images are saved in Base64 on the server, and transferred to the client, which as we all know can read Base64. Here is the client side version of Base 64 in an SO Post. How can you encode a string to Base64 in JavaScript? Is http/https 8 bit

Converting a hexadecimal string to base64 in javascript [duplicate]

由 心不动则不痛 提交于 2020-01-03 00:39:33
问题 This question already has answers here : HEX to Base64 converter for JavaScript (4 answers) Closed 4 years ago . 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. Any help would be appreciated 回答1: var hexArray = myHexString .replace(/\r|\n/g, "") .replace(/([\da-fA-F]{2}) ?/g, "0x$1 ") .replace(/ +$/, "") .split(" "); var byteString = String.fromCharCode.apply(null, hexArray); var base64string

如何跨项目工作空间访问MaxCompute资源和函数

由 蹲街弑〆低调 提交于 2020-01-02 17:39:01
1、背景介绍 同一个主账号下面的两个工作空间，工作空间名称分别为 A工作空间名称:wei_wwww A工作空间子账号：mc_oss B工作空间名称:wei_mc B工作空间子账号：bigdata_wei 现在B工作空间子账号bigdata_wei需要访问A工作空间子账号mc_oss创建的UDF函数。执行查询语句报错信息如下： 2、MaxCompute项目空间支持的对象类型及操作 MaxCompute提供了ACL授权、跨项目空间数据分享、项目空间数据保护等多种策略。授权操作一般涉及到三个要素，即主体（Subject，可以是用户也可以是角色）、客体（Object）和操作（Action）。在MaxCompute中，主体是指用户或角色，客体是指项目空间中的各种类型对象。我们推荐您优先使用ACL（基于对象）授权，而非Policy（基于策略）授权。 ACL授权中，MaxCompute的客体包括项目空间、表、函数、资源、任务实例 授权方式： grant actions on object to subject； [外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-Jc8yFW4V-1577951993715)(data:image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw=

how to convert an opencv image to a string using boost base64_text (c++)

由 社会主义新天地 提交于 2020-01-02 07:04:13
问题 I have an opencv image and I want to convert it to a base46 string so I can serialize it. I have this code: std::vector<char> convertImageToChar(cv::Mat image) { std::stringstream os; int imageSize = image.size().area() * image.elemSize1(); typedef boost::archive::iterators::base64_from_binary<const char *> base64_text; // compose all the above operations in to a new iterator std::vector<char> output(base64_text(image.data), base64_text(image.data + imageSize)); return output; } The code

Why does conversion from two different base64 strings return equal arrays of bytes?

由 时光总嘲笑我的痴心妄想 提交于 2020-01-02 06:50:08
问题 I am wondering why conversion from base64 strings returns equal byte arrays for different strings? const string s1 = "dg=="; const string s2 = "dq=="; byte[] a1 = Convert.FromBase64String(s1); byte[] a2 = Convert.FromBase64String(s2); Console.WriteLine(a1.SequenceEqual(a2)); // prints "True". 回答1: Because of the encoding rules. When the last four-character group contains two padding characters (as is the case here) it decodes to a single byte. This means that decoding will take into account

Detect base64 encoding

由 纵饮孤独 提交于 2020-01-02 05:12:10
问题 Does anyone know of a jQuery plugin that can check if text is base64 encoded by chance? I want to be able to decode base64 strings but only if the string is encoded to begin with. I see several scripts out there that can encode and decode but I really one that can check if the string is encoded. Does such a thing exist? 回答1: Must it really be a jQuery plugin? Just use a simple JavaScript regex match: var base64Matcher = new RegExp("^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=

How to convert Pandas DataFrame to bytes-like object

由 隐身守侯 提交于 2020-01-02 04:59:05
问题 Hi I am trying to convert my df to binary and store it in a variable. my_df: df=pd.DataFrame({'A':[1,2,3],'B':[4,5,6]}) my code: import io towrite = io.BytesIO() df.to_excel(towrite) # write to BytesIO buffer towrite.seek(0) # reset pointer I am getting AttributeError: '_io.BytesIO' object has no attribute 'write_cells' Full Traceback: AttributeError Traceback (most recent call last) <ipython-input-25-be6ee9d9ede6> in <module>() 1 towrite = io.BytesIO() ----> 2 df.to_excel(towrite) # write to

Java buffered base64 encoder for streams

由 蹲街弑〆低调 提交于 2020-01-02 04:15:11
问题 I have lots of PDF files that I need to get its content encoded using base64. I have an Akka app which fetch the files as stream and distributes to many workers to encode these files and returns the string base64 for each file. I got a basic solution for encoding: org.apache.commons.codec.binary.Base64InputStream; ... Base64InputStream b64IStream = null; InputStreamReader reader = null; BufferedReader br = null; StringBuilder sb = new StringBuilder(); try { b64IStream = new Base64InputStream
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