javascript - Ajax 不发布大图像的 base64 数据

标签 javascript php jquery ajax base64

我正在通过 ajax 将图像 base64 数据传递到我的 php 函数,但是对于大尺寸图像,Ajax 不会发布数据。但是相同的代码非常适合小图像。

srcdata=data:image/jpeg;base64,/9j/4SxvRXhpZgAASUkqAAgAAAANAAABBAABAAAAwAwAAAEBBAABAAAALAcAAA8BAgAIAAAAqgAAABABAgARAAAAsgAAABIBAwABAAAABgAAABoBBQABAAAAxAAAABsBBQABAAAAzAAAACgBAwABAAAAAgAAADEBAgAMAAAA1AAAADIBAgAUAAAA4AAAABMCAwABAAAAAQAAAGmHBAABAAAA9AAAACWIBAABAAAA3gkAAPAJAABTQU1TVU5HAFNBTVNVTkctU0dILUk1MzcAAEgAAAABAAAASAAAAAEAAABJNTM3VUNVQ05DOQAyMDE0OjA2OjIyIDEwOjE3OjEwACEAmoIFAAEAAACGAgAAnYIFAAEAAACOAgAAIogDAAEAAAADAAAAJ4gDAAEAAAB9AAAAAJAHAAQAAAAwMjIwA5ACABQAAACWAgAABJACABQAAACqAgAAAZEHAAQAAAABAgMAAZIKAAEAAAC 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 giAABS0pLSmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGVXEABVVxAAVVcQAFmWAACWZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZVcQAFVXEABVVxAAVVcQAFVXEABVVxAAVVcQAFVXEABZlwAAlmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGVXEABVVxAAVVcQAFVXEABVVxAAVVcQAFVXEABVVxAAWZcAAJZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABlVxAAVVcQAFVXEABVVxAAVVcQAFVXEABVVxAAVVcQAFmXAACWZxAAZmcQAGZnEABmZxAAZmcQAGZnEABplwAAlVcQAFVXEABVVxAAVVcQAFVXEABVVxAAVVcQAFVXEABZlwAAlmcQAGZnEABmZxAAZmcQAGZnEABmZxAAaZcAAJVXEABVVxAAVVcQAFVXEABVVxAAVVcQAFVXEABVVxAAWZcAAJZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGmXAACVVxAAVVcQAFVXEABVVxAAVVcQAFVXEABVVxAAVVcQAFmXAACWZxAAZmcQAGZnEABmZxAAZmcQAGZnEABplwAAlVcQAFVXEABVVxAAVVcQAFVXEABVVxAAVVcQAFVXEABZlwAAlmcQAGZnEABmZxAAZmcQAGZnEABmZxAAaZcAAJVXEABVVxAAVVcQAFVXEABVVxAAVVcQAFVXEABVVxAAWZcAAJmXAACWZxAAZmcQAGZnEABmZxAAZmcQAGmXAACVVxAAVVcQAFVXEABVVxAAVVcQAFVXEABVVxAAVVcQAFmWAACZlwAAlmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGVXEABVVxAAVVcQAFVXEABVVxAAVVcQAFVXEABZlgAAmZcAAJZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAYRUAABmXAACWZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZmcQAGZnEABmZxAAZLSktKAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAASLAAAf/8AACRQAABVo8AAf/3AAB25wABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAATv8AAf/2AACFNwABTv8AAf/2AACFNwABT5QAAf/2AACFXgABT5QAAf/2AACFXgABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEtKABYAAEZBRkEAHIjEAAEAHOcsAAEAMRzRAAIARn5sAAIAWwYuAAMAcAgFAAMAmtFlAAEAmnjxAAEAmpN5AAEAjPohAAEAfnrCAAIAcNwgAAIAYjlTAAMAVDJzAAMARuH8AAIAVOH8AAIBgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAABgQAAAAAAAAAARkFGQQADAD8AAwArAABGQUZBABg8AAAAPAAAAFMwOFFFTENHQzAxAAcAAQAHAAQAAAAwMTAwAgAEAAEAAAAAIAEADAAEAAEAAAAAAAAAEAAFAAEAAABaAAAAQAAEAAEAAAAAAAAAUAAEAAEAAAABAAAAAAEDAAEAAAAAAAAAAAAAAAAAAAAAAAAAAgABAAIABAAAAFI5OAACAAcABAAAADAxMDAAAAAAAQAAAAEABAAAAAICAAAAAAAACQAAAQQAAQAAAAABAAABAQQAAQAAAJAAAAADAQMAAQAAAAYAAAASAQMAAQAAAAYAAAAaAQUAAQA `

数据太大,只发布了一部分,

ajax

count = 1;
name='test'
jQuery.ajax({
    url:"/createImage.php",
    data:{img_data:srcdata,img_id:count,name:name},
    type:"POST",
    contentType:"application/x-www-form-urlencoded",
    success:function(result)
    {
        alert(result);
    }
});

PHP

print_r($_POST); // is empty when logging..

当我试图在 php 中获取帖子数据时,我变得空了。 使用base64时ajax不发送数据的原因可能是什么。

最佳答案

我同意 TrueBlueAussie .这看起来像是 PHP 中的服务器端设置。

打开您的 php.ini 文件并找到说明 upload_max_filesize 的行。默认它设置为2M,即2MB。尝试将其增加到 3MB,看看您是否仍然收到错误消息。

注意:您需要重启 Apache/Nginx/webserver 才能使 php.ini 文件生效。

即使您将文件作为变量发送,application/x-www-form-urlencoded 也可能在 PHP 中被解释为实际文件上传。您可以查看的另一个 php.ini 设置是 post_max_size,默认值为 8M,这是您可以 POST 到 PHP 脚本的最大值。

关于javascript - Ajax 不发布大图像的 base64 数据,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28296252/

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