Angular 如何使用角度';s2&x2B@角度/http模块?
我正在尝试从angular 2应用程序中提供pdf下载 此代码适用于:Angular 如何使用角度';s2&x2B@角度/http模块?,angular,rxjs,Angular,Rxjs,我正在尝试从angular 2应用程序中提供pdf下载 此代码适用于: var reportPost = 'variable=lsdkjf'; var xhr = new XMLHttpRequest(); xhr.open("POST", "http://localhost/a2/pdf.php", true); xhr.responseType = 'blob'; xhr.setRequestHeader("Content-type", "appl
var reportPost = 'variable=lsdkjf';
var xhr = new XMLHttpRequest();
xhr.open("POST", "http://localhost/a2/pdf.php", true);
xhr.responseType = 'blob';
xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xhr.onreadystatechange = function() {//Call a function when the state changes.
if(xhr.readyState == 4 && xhr.status == 200) {
var blob = new Blob([this.response], {type: 'application/pdf'});
saveAs(blob, "Report.pdf");
}
}
xhr.send(reportPost);
但我希望使用Angular2的内置Http客户端
一点研究:
- 过帐时未写入的有角度的单据:
- 不确定这是否适用,但rxjs responseType参数 要仅包含文本和json,请执行以下操作:
var headers = new Headers();
headers.append('Content-Type', 'application/x-www-form-urlencoded');
this.http.post('http://localhost/a2/pdf.php', reportPost, {
headers: headers
})
.retry(3)
// .map( (res:any) => res.blob() ) // errors out
.subscribe(
(dataReceived:any) => {
var blob = new Blob([dataReceived._body], {type: 'application/pdf'});
saveAs(blob, "Report.pdf");
},
(err:any) => this.logError(err),
() => console.log('Complete')
);
另外,saveAs函数来自于此:随着Angular2 final的发布,我们可以定义一个服务:
@Injectable()
export class AngularService {
constructor(private http: Http) {}
download(model: MyModel) { //get file from service
this.http.post("http://localhost/a2/pdf.php", JSON.stringify(model), {
method: RequestMethod.Post,
responseType: ResponseContentType.Blob,
headers: new Headers({'Content-Type', 'application/x-www-form-urlencoded'})
}).subscribe(
response => { // download file
var blob = new Blob([response.blob()], {type: 'application/pdf'});
var filename = 'file.pdf';
saveAs(blob, filename);
},
error => {
console.error(`Error: ${error.message}`);
}
);
}
}
此服务将获取文件,然后将其提供给用户
zip文件示例:带有
@4.3、@5
,最后我做了:
this.http.post(`${environment.server}/my/download`,
data,
{responseType: 'blob', observe: 'response'})
.map( res => ({content: res.body,
fileName: res.headers.get('content-filename')}));
请看这里:
似乎blob()方法尚未实现。看见跟踪实现状态的问题可以在这里找到:您究竟是如何让“saveAs”工作的?我已经安装了模块,安装了打字,但在运行它时仍然得到“no-such-function:saveAs”。。太烦人了。。。如何将其包含在typescript代码中?(我使用webpack,还没有弄明白)我只是忽略了TS编译器的错误。它仍然编译。。。邋遢吧?谢谢!我错过了responseType:ResponseContentType.Blob。有人能把这个标记为正确答案吗?我已经找了好几年了。从'@angular/http'导入{ResponseContentType};我必须使用http.get(url,{responseType:“application/octet stream”}),因为http.get无法识别ResponseContentType类型的responseType,并且需要字符串。您不能设置除“json”之外的其他字符串,因此我不得不愚弄TS编译器。我得到了以下错误
[TS]属性“blob”在类型“blob”上不存在。
有人知道为什么吗?
return this._http.get('/api/images/' + _id, {responseType: 'blob'}).map(blob => {
var urlCreator = window.URL;
return this._sanitizer.bypassSecurityTrustUrl(urlCreator.createObjectURL(blob));
})