base64

Interpreting base 64 in C# from an image based via JSON/PHP (base64_encode)

由 霸气de小男生 提交于 2019-12-23 17:42:04
问题 So I'm able to read an image file successfully, and pass it back to my C# application but I'm unable to decode it properly. I'm returning the JSON data as such (the json_encode function isn't shown) via PHP: $imgbinary = fread(fopen($filename, "r"), filesize($filename)); if ( strlen($imgbinary) > 0 ){ return array("success"=>true, "map"=>base64_encode($imgbinary)); } Then in C# I use Newtonsoft.Json to decode the string (I can read success and the map properties successfully), but I'm unable

Inline generated images exceeding length

由 ￣綄美尐妖づ 提交于 2019-12-23 16:07:07
问题 I am using PHP to generate images and this works fine. I am having trouble displaying these images however: My image generator is a PHP file that takes tons of parameters and loads of data to generate the image. Because of the excessive amounts that has to be passed to the generator, using the GET container does not work for me, so the data is sent via a POST request. The result of this request is the raw image data. I am using $result = post_request('http://myurl.com/graphx/generator.php',

Upload base64 image to amazon s3

由 一个人想着一个人 提交于 2019-12-23 15:44:55
问题 I'm having some issues when trying to upload an image to AWS S3. It seems to upload the file correctly but, whenever I try to download or preview, it can't be opened. Currently, this is the upload code I'm using: <?php require_once 'classes/amazon.php'; require_once 'includes/aws/aws-autoloader.php'; use Aws\S3\S3Client; $putdata = file_get_contents("php://input"); $request = json_decode($putdata); $image_parts = explode(";base64,", $request->image); $image_type_aux = explode("image/", $image

后台将图片以base64形式传给前台，前台展示

由 亡梦爱人 提交于 2019-12-23 14:12:49
图片以base64形式在页面上展示出来 在这里要说到Data URI scheme，它可以直接将一些小的数据直接嵌入到网页中，不需要再引入。支持格式如下 data:, 文本数据 data:text/plain, 文本数据 data:text/html, HTML代码 data:text/html;base64, base64编码的HTML代码 data:text/css, CSS代码 data:text/css;base64, base64编码的CSS代码 data:text/javascript, Javascript代码 data:text/javascript;base64, base64编码的Javascript代码 data:image/gif;base64, base64编码的gif图片数据 data:image/png;base64, base64编码的png图片数据 data:image/jpeg;base64, base64编码的jpeg图片数据 data:image/x-icon;base64, base64编码的icon图片数据 所以此时只要是将base64格式的图片赋值给图片的 src 属性即可。 <img src= "data:image/png;base64

How to convert base64 string to binary array using php

由 六月ゝ 毕业季﹏ 提交于 2019-12-23 12:54:46
问题 I have base 64 encoded string that looks something like this. cuVrcYvlqYze3OZ8Y5tSqQY205mcquu0GsHkgXe4bPg= I have tried base64_decode and output is. råkq‹å©ŒÞÜæ|c›R©6Ó™œªë´Áäw¸lø I think I may be doing something wrong. I appreciate any help to convert base64 string to binary array. Thanks 回答1: like this $a = base64_decode("cuVrcYvlqYze3OZ8Y5tSqQY205mcquu0GsHkgXe4bPg="); $b = array(); foreach(str_split($a) as $c) $b[] = sprintf("%08b", ord($c)); print_r($b); 回答2: You already are getting binary

Null reference exceptions during Base64 deserialization (C#)

由 你说的曾经没有我的故事 提交于 2019-12-23 12:47:23
问题 I am using the following methods to serialize and deserialize .NET objects: public static string SerializeToBase64(object data) { var stream = new MemoryStream(); var formatter = new BinaryFormatter(); formatter.Serialize(stream, data); stream.Position = 0; return Convert.ToBase64String(stream.ToArray()); } public static object DeserializeFromBase64(string data) { var stream = new MemoryStream(Convert.FromBase64String(data)); stream.Position = 0; var formatter = new BinaryFormatter(); return

Why don't Base64 Embedded fonts work in IE11 if “font download” property is disabled?

由 对着背影说爱祢 提交于 2019-12-23 12:31:45
问题 So at face value, this makes sense -- if IE disables "font download," it shouldn't download, fine, I accept that. HOWEVER -- what about using base64 fonts? These are embedded directly in CSS / do not reference a physical file, therefore no font should need to be downloaded, right? At first I thought that maybe IE11 didn't like/support base64, but I can verify that it does work there when I use only a base64 font option. I wasn't able to find any specs on this, or much info on the breadth of

Retrofit image upload using Base64 in android

由 烈酒焚心 提交于 2019-12-23 09:34:50
问题 I am trying to upload the image using retrofit in Base64 format. To convert bitmap to Base64, public static String convertImageToStringForServer(Bitmap imageBitmap){ ByteArrayOutputStream stream = new ByteArrayOutputStream(); if(imageBitmap != null) { imageBitmap.compress(Bitmap.CompressFormat.JPEG, 60, stream); byte[] byteArray = stream.toByteArray(); return Base64.encodeToString(byteArray, Base64.DEFAULT); }else{ return null; } } I do not want to upload the image using Typedfile. My request

problem using base64 encoder and InputStreamReader

由 僤鯓⒐⒋嵵緔 提交于 2019-12-23 09:02:30
问题 I have some CLOB columns in a database that I need to put Base64 encoded binary files in. These files can be large, so I need to stream them, I can't read the whole thing in at once. I'm using org.apache.commons.codec.binary.Base64InputStream to do the encoding, and I'm running into a problem. My code is essentially this FileInputStream fis = new FileInputStream(file); Base64InputStream b64is = new Base64InputStream(fis, true, -1, null); BufferedReader reader = new BufferedReader(new

js file上传图片转base64并压缩

由 倖福魔咒の 提交于 2019-12-23 07:58:26
1 /*照片1*/ 2 var scene_pics_map = {}; 3 /*照片2*/ 4 var car_chekc_pics_map = {}; 5 /* 图片预览 */ 6 function imgPreview(obj, type) { 7 console.log(1); 8 $.showPreloader(); 9 var file = obj.files[0]; 10 11 console.log(obj); 12 console.log(file); 13 console.log("file.size = " + file.size); // file.size 单位为byte 14 15 var reader = new FileReader(); 16 17 // 读取文件过程方法 18 reader.onloadstart = function(e) { 19 console.log("开始读取...."); 20 } 21 reader.onprogress = function(e) { 22 console.log("正在读取中...."); 23 } 24 reader.onabort = function(e) { 25 console.log("中断读取...."); 26 } 27 reader.onerror = function(e) {
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