发送自定义响应，并在javascript客户机上使用tusdotnet捕获它。

Question

我正在使用来自tusdotnet的tus.io在ASP.NET核心应用程序中，我试图发送一个自定义的响应，因为我要把条目放在数据库中，并且需要在响应中返回数据库Id。在javascript端，在文件成功上传后，响应始终为null。

onSuccess: function (response) {
    try {
        console.log(response); // this part is always null. even if the json response was received in the final network call.
    } catch (e) {
        console.log('Error onSuccess: ', e);
    }                        
}

得把回应拿回来。

https://github.com/tus/tus-js-client/blob/master/docs/api.md

Answer 1

结果，tusdotnet默认将响应状态代码发送回204 No Content，这意味着从库本身忽略了我的响应。

我必须将HttpContext.Response从Tus配置中更改为将状态代码发送为200 OK，以便将响应从asp.net core应用程序中传回。对于OnFileCompleteAsync事件中的exapmle，我必须将默认状态代码(204 No Content)更改为200 OK。

ctx.HttpContext.Response.StatusCode = StatusCodes.Status200OK;
await ctx.HttpContext.Response.WriteAsJsonAsync(new FileUploadResponseModel() { FileName = "Modified File Path", Path = "Extra info regarding the path", FileId = "Database Id" }, ctx.CancellationToken);

为了在onSuccess回调中捕获响应：

onSuccess: function (response) {
    try {
        console.log(response); // This method should have the response after below changes
    } catch (e) {
        console.log('Error onSuccess: ', e);
    }                        
}

我必须修改javascript库，以便正确地emit响应，因为204 No Content的实现被修改为200 OK。负责处理此更改的函数是_emitSuccess。

function _emitSuccess() {
    if (this.options.removeFingerprintOnSuccess) {
        // Remove stored fingerprint and corresponding endpoint. This causes
        // new uploads of the same file to be treated as a different file.
        this._removeFromUrlStorage();
    }
    if (typeof this.options.onSuccess === 'function') {
        this.options.onSuccess();
    }
}

必须修改上述方法以：

function _emitSuccess(res) {
    if (this.options.removeFingerprintOnSuccess) {
        // Remove stored fingerprint and corresponding endpoint. This causes
        // new uploads of the same file to be treated as a different file.
        this._removeFromUrlStorage();
    }
    if (typeof this.options.onSuccess === 'function') {
        this.options.onSuccess(res);
    }
}

在进行此更改之后，我必须修改执行此回调的所有位置，以传递响应。例如在_handleUploadResponse回调中：

this._emitSuccess(res); // pass on the response received in the handler.

同样，需要修改它正在消费的所有地方。

CDN：https://cdn.jsdelivr.net/npm/tus-js-client@latest/dist/tus.js