ng2-file-upload内部express服务器返回500错误

Question

在ng2-file-upload包中，当我调用uploader.uploadAll();时，收到了来自ng2-file-upload内部快速服务器的500响应

TypeError: Cannot read property 'toLowerCase' of null
    at Route._handles_method (/home/idea/Development/HisasOnline/web-app/node_modules/express/lib/router/route.js:63:21)
    at next (/home/idea/Development/HisasOnline/web-app/node_modules/express/lib/router/index.js:244:30)
    at expressInit (/home/idea/Development/HisasOnline/web-app/node_modules/express/lib/middleware/init.js:40:5)
    at Layer.handle [as handle_request] (/home/idea/Development/HisasOnline/web-app/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/home/idea/Development/HisasOnline/web-app/node_modules/express/lib/router/index.js:317:13)
    at /home/idea/Development/HisasOnline/web-app/node_modules/express/lib/router/index.js:284:7
    at Function.process_params (/home/idea/Development/HisasOnline/web-app/node_modules/express/lib/router/index.js:335:12)
    at next (/home/idea/Development/HisasOnline/web-app/node_modules/express/lib/router/index.js:275:10)
    at query (/home/idea/Development/HisasOnline/web-app/node_modules/express/lib/middleware/query.js:45:5)
    at Layer.handle [as handle_request] (/home/idea/Development/HisasOnline/web-app/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/home/idea/Development/HisasOnline/web-app/node_modules/express/lib/router/index.js:317:13)
    at /home/idea/Development/HisasOnline/web-app/node_modules/express/lib/router/index.js:284:7
    at Function.process_params (/home/idea/Development/HisasOnline/web-app/node_modules/express/lib/router/index.js:335:12)
    at next (/home/idea/Development/HisasOnline/web-app/node_modules/express/lib/router/index.js:275:10)
    at Function.handle (/home/idea/Development/HisasOnline/web-app/node_modules/express/lib/router/index.js:174:3)
    at Function.handle (/home/idea/Development/HisasOnline/web-app/node_modules/express/lib/application.js:174:10)

options对象：

 uploadOptions: FileUploaderOptions = { url: 'https://localhost:4200/api/course/document', method: 'patch' };

Answer 1

PATCH方法不受支持这就是您收到该错误的原因，请改用POST