base64

Download image which is src attribute (base64)

由 ⅰ亾dé卋堺 提交于 2020-01-04 06:33:27
问题 through AJAX I receive a image in base64 which I adjunct to the src attribute of a img tag. I want to offer an option to download that image, is it possible to take the data of the src attribute and download it? This is because I cannot download the image again from the server. Thank you. 回答1: Just set the window.location to the encoded URI (or open a popup window), eg window.location.href = 'data:image/png;base64,iVBORw0KGgo.... 来源： https://stackoverflow.com/questions/13354037/download-image

Recover ArrayBuffer from xhr.responseText

由 痴心易碎 提交于 2020-01-04 06:04:14
问题 I need to get an array buffer from an http request sending me a base64 answer. For this request, I can't use XMLHttpRequest.responseType="arraybuffer" . The response I get from this request is read through xhr.responseText . Hence it's encoded as a DOMString. I'm trying to get it back as an array buffer. I've tried to go back to the base64 from the DOMString using btoa(mysString) or window.btoa(unescape(encodeURIComponent(str))) but the first option just fails, whereas the second option doesn

Delphi 2010 - Decode Base64 encoded image from XML doc

由 让人想犯罪 __ 提交于 2020-01-04 04:07:08
问题 I am trying to decode a base64 encoded EMF image from an XML document in my application and render it on screen, however, it never seems to appear. If I copy/paste the data from the XML document into Notepad++ and use the Base64 Decode option and save the file as a .emf it opens fine in mspaint. So I think the issue is how I am decoding it. I have tried the following decode methods described in these articles: How to encode / decode Base 64 string http://www.swissdelphicenter.ch/torry

php与java通用AES加密解密算法

由 让人想犯罪 __ 提交于 2020-01-04 03:41:32
AES指高级加密标准（Advanced Encryption Standard）,是当前最流行的一种密码算法，在web应用开发，特别是对外提供接口时经常会用到，下面是我整理的一套php与java通用的AES加密解密算法。 php版代码如下： 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 <?php

ASCII码和BASE64

由 北战南征 提交于 2020-01-04 02:40:43
ASCII码介绍 ASCII ((American Standard Code for Information Interchange): 美国信息交换标准代码）是基于拉丁字母的一套电脑编码系统，主要用于显示现代英语和其他西欧语言。 到目前为止共定义了128个字符 用于将字符转换未二进制码 ASCII 码使用指定的 7 位或 8 位二进制数组合来表示 128 或 256 种可能的字符。标准 ASCII 码也叫基础ASCII码，使用 7 位二进制数来表示所有的大写和小写字母，数字 0 到 9、标点符号， 以及在美式英语中使用的特殊控制字符 通过一种通用的标准，使信息可以传入，一种二进制序列会被 识别未相同的结果 ASCII码表大致可以分三部分组成： ASCII非打印控制字符 ASCII表上的数字0–31分配给了控制字符，用于控制像打印机等一些外围设备。例如，12代表换页/新页功能。此命令指示打印机跳到下一页的开头。（参详ASCII码表中0-31） ASCII打印字符 数字 32–126 分配给了能在键盘上找到的字符，当您查看或打印文档时就会出现。数字127代表 DELETE 命令。（参详ASCII码表中32-127） 扩展ASCII打印字符 扩展的ASCII字符满足了对更多字符的需求。扩展的ASCII包含ASCII中已有的128个字符（数字0–32显示在下图中），又增加了128个字符

字体反爬虫——58租房

由 ぃ、小莉子 提交于 2020-01-04 00:47:23
58是一个字体反爬相对简单的网站了，它只对数字进行了反爬处理。适合拿来做字体反爬入门。 先上代码，在详细记录，纯小白操作，不怕看不懂啊： import requests import base64 import re from fontTools.ttLib import TTFont # 获取参数，这里主要是返回的响应内容，及匹配到的font_face被base64编码的文件 def get_params(url): resp = requests.get(url) content = resp.text # print(resp.text) font_face = re.search("font-face{.*?base64,(.*?)'.*?}", content, re.S).group(1).strip() # print(font_face) return font_face, content # 解base64编码，写入ttf字体文件 def parse_font_face(font_face): font_face = base64.b64decode(font_face) with open('58.ttf', 'wb') as f: f.write(font_face) font = TTFont('58.ttf') font.saveXML('58.xml')

sendmail或mail命令乱码排错

由 [亡魂溺海] 提交于 2020-01-04 00:13:36
【解决办法】 直接贴出命令。 1 echo “邮件内容” |mail -s “=?UTF-8?B? echo 中文主题 | base64 ?=” 18888668@qq.com – -f user1@test.com 主题前加 1 =?UTF-8?B?`echo #echo前为反引号 主题后加 1 | base64`?= #base64后为反引号 接着再次发送邮件，主题显示正常。 如安装了sendmail会占用25端口产生冲突 service postfix status lsof -i:25 停止sendmail /etc/init.d/sendmail stop 取消自動開機啟動 chkconfig sendmail off 如果没装chkconfig用 sudo systemctl enable sendmail 来源： CSDN 作者： Skywin88 链接： https://blog.csdn.net/Skywin88/article/details/103819820

Base64 encode with Stream_StringToBinary inserts a newline, breaking the string?

由 此生再无相见时 提交于 2020-01-03 19:42:27
问题 Maybe I'm crazy, but it looks like the famous code to run Base64 in VB inserts a newline character (ascii 10) at the 73rd position, which subsequently makes the encoded string invalid for Basic authentication - or anything else for that matter. Original code: Function Stream_StringToBinary(Text) Const adTypeText = 2 Const adTypeBinary = 1 'Create Stream object Dim BinaryStream 'As New Stream Set BinaryStream = CreateObject("ADODB.Stream") 'Specify stream type - we want To save text/string

Base64 encode with Stream_StringToBinary inserts a newline, breaking the string?

由 匆匆过客 提交于 2020-01-03 19:41:08
问题 Maybe I'm crazy, but it looks like the famous code to run Base64 in VB inserts a newline character (ascii 10) at the 73rd position, which subsequently makes the encoded string invalid for Basic authentication - or anything else for that matter. Original code: Function Stream_StringToBinary(Text) Const adTypeText = 2 Const adTypeBinary = 1 'Create Stream object Dim BinaryStream 'As New Stream Set BinaryStream = CreateObject("ADODB.Stream") 'Specify stream type - we want To save text/string

Efficient binary-to-string formatting (like base64, but for UTF8/UTF16)?

由 末鹿安然 提交于 2020-01-03 09:05:14
问题 I have many bunches of binary data, ranging from 16 to 4096 bytes, which need to be stored to a database and which should be easily comparable as a unit (e.g. two bunches of data batch only if the lengths match and all bytes match). Strings are nice for that, but converting binary data blindly to a string is apt to cause problems due to character encoding/reinterpretation issues. Base64 was a common method for storing strings in an era when 7-bit ASCII was the norm; its 33% space penalty was
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