我正在尝试使用角度2进行http.post调用。我已经测试了postman中的调用,所以我知道api正在运行。我收到一个错误,输入为空,这意味着它没有获取数据。我已经阅读了一些答案和文章,但无法使用成功调用。
有谁能让我对我失踪的东西有所了解?
public upload(name: string, data: any, result, contentType: string) : Promise<Response> {
let headers = new Headers({ 'Content-Type': contentType });
let options = new RequestOptions({ headers: headers });
return this.http
.post(this.urlAPI, data, options)
.toPromise()
.then(this.extractData)
.catch(this.handleError);
}
extractData(res:Response) {
console.log('res: ', res);
let body = res.json();
return Promise.resolve(res);
}
handleError(err: any): Promise<any> {
console.error('An Error has occured: ', err);
return Promise.reject(err);
}
答案 0 :(得分:1)
我不确定您的'数据'的类型是什么。数据必须在发送之前进行字符串化。以下是我的可行版本。
saveNote(note: ApprovalNoteModel): Observable<ApprovalNoteModel> {
let body = JSON.stringify(note);
let headers = this.utilsSvc.getAuthHeaders();
headers.set('Content-Type', 'application/json');
return this.http.post('cloud/api/approval/note', body,
{ headers: headers }
).map(response => response.json());
}
如果它是一个文件,那么你不能通过'http'做到这一点,我相信。这是我可行的版本。
addFileRequest(referenceId: number, licenseId: number, url: string, files: File[]): Observable<any> {
return Observable.create(observer => {
this.progressObserver = observer;
let formData: FormData = new FormData(),
xhr: XMLHttpRequest = new XMLHttpRequest();
formData.append('referenceId', referenceId);
formData.append('licenseId', licenseId);
for (let i = 0; i < files.length; i++) {
formData.append("uploads[]", files[i], files[i].name);
}
xhr.onreadystatechange = () => {
if (xhr.readyState === 4) {
if (xhr.status === 200) {
observer.next(xhr.response);
observer.complete();
} else {
if (xhr.response.status)
observer.error(xhr.response);
else
observer.error({ 'status': xhr.status, '_body': xhr.response });
}
}
};
xhr.upload.onprogress = (event) => {
this.progress = Math.round(event.loaded / event.total * 100);
this.progressObserver.next(this.progress);
};
xhr.open('POST', url, true);
xhr.setRequestHeader('Authorization', this.utilsSvc.getToken());
xhr.send(formData);
});
}