node.js - 如何使用 base64 图像发送 post 请求?
问题描述
我正在使用自定义裁剪选项在 vue js 中制作图像上传组件。裁剪后的版本在我的状态下保存为 base64 字符串。就是这个:
data:image/png;base64,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....
现在我正在尝试使用发布请求 API 将此图像发送到我的节点 js 服务器。在 Postman 中,我正在编写正文,以这种方式在正文中选择“raw”和“json”:
{
"image" : "data:image/png;base64,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.....
}
请求未在正文中检测到此 json 数据并返回错误:
{
"image": "\"image\" is required"
}
也试过这种方式的form_data发送方式:
var axios = require('axios');
var FormData = require('form-data');
// var fs = require('fs');
var data = new FormData();
data.append('image', formdata.logoFinalImage);
var config = {
method: 'post',
url: myurl,
headers: {
'Authorization': this.state.token,
'Content-Type': 'application/json'
},
data: data
};
axios(config)
.then(function (response) {
console.log(JSON.stringify(response.data));
})
.catch(function (error) {
console.log(error);
});
同样的问题。如何将最终裁剪版本发送到节点 api 端点?
解决方案
解决了这个问题。有两种方法可以做到这一点。一个是需要在后端进行更改,以便以可以接收 base64 并将其转换为图像的方式配置代码。参考:https ://medium.com/js-dojo/how-to-upload-base64-images-in-vue-nodejs-4e89635daebc
另一种是制作base64图像文件,然后作为form-data发送到后端。在我的情况下使用了这个。此解决方案的参考:https ://gist.github.com/ibreathebsb/a104a9297d5df4c8ae944a4ed149bcf1