[英]How can i send a PDF as an attachment , if I only have the PDF URL
我有一个离子应用程序,该应用程序根据用户的输入进行某些计算。计算后,结果通过API(generatePDF)调用转换为PDF。另一个要求是通过电子邮件发送相同的PDF。 一个API(sendMail)是为相同的。 在sendMail API的标头部分设置了enctype ='multipart / form-data' 。
我现在有了PDF URL,它是generatePDF API的响应。 如何使用该URL将PDF附加到要发送的邮件上?
谁能帮忙吗?
谢谢@MissakBoyajian的帮助。这就是我所做的。
为离子本机安装的文件传输和文件插件
this.platform.ready().then(() => {
const fileTransfer: FileTransferObject = this.transfer.create();
const pdfLocation = this.pdffile;//pdffile is the PDF URL which we got as the response from the generatePDF API
fileTransfer.download(pdfLocation, this.storageDirectory + "filename.pdf").then((entry) => {
const alertSuccess = this.alertCtrl.create({
title: `Download Succeeded!`,
subTitle: `PDF was successfully downloaded to: ${entry.toURL()}`,
buttons: ['Ok']
});
alertSuccess.present();
this.file.readAsDataURL(this.storageDirectory, 'filename.pdf')
.then((datafile) =>{
this.attachpdf(id,datafile);
})
.catch((err) =>{
console.log("Error is that "+err);
});
}, (error) => {
const alertFailure = this.alertCtrl.create({
title: `Download Failed!`,
subTitle: `PDF was not successfully downloaded. Error code: ${error.code}`,
buttons: ['Ok']
});
alertFailure.present();
});
});
使用一个函数(我从搜索中获得)将base64data转换为blob。
public dataURItoBlob(dataURI) {
// convert base64/URLEncoded data component to raw binary data held in a string
var byteString;
if (dataURI.split(',')[0].indexOf('base64') >= 0)
byteString = atob(dataURI.split(',')[1]);
else
byteString = unescape(dataURI.split(',')[1]);
// separate out the mime component
var mimeString = dataURI.split(',')[0].split(':')[1].split(';')[0];
// write the bytes of the string to a typed array
var ia = new Uint8Array(byteString.length);
for (var i = 0; i < byteString.length; i++) {
ia[i] = byteString.charCodeAt(i);
}
return new Blob([ia], {type:mimeString});
}
然后,
public attachpdf(emailid,filetoattach){
let headers = new Headers();
headers.append(...);
headers.append('enctype','multipart/form-data');
var blob = this.dataURItoBlob(filetoattach);
var data ={... };
var formData = new FormData();
formData.append("data",JSON.stringify(data));
formData.append("doc",blob);
this.http.post('sendMail API',formData, {headers: headers})
.map(res => res.json())
.subscribe(results => {
...
},
error=>{
..
}
)
}
终于奏效了。
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