Simple operation of JS download file stream (code attached)
The following is a simple operation of JS download file flow that I have compiled for you. Interested students can take a look.
The download code is as follows:
var xhr = new XMLHttpRequest();
var formData = new FormData();
formData.append('snNumber', $("#snNumber").val());
formData.append('spec', $("#spec").val());
formData.append('startCreateDate', $("#startCreateDate").val());
formData.append('endCreateDate', $("#endCreateDate").val());
formData.append('startActiveDate', $("#startActiveDate").val());
formData.append('endActiveDate', $("#endActiveDate").val());
formData.append('supplier', $("#supplier").val());
formData.append('state', $("#cboDeviceStatus").val());
xhr.open('POST', vpms.ajaxUrl + vpms.manageUserUrl + "exportExcelDevices", true);
xhr.setRequestHeader("accessToken", userInfo.accessToken);
xhr.responseType = 'blob';
xhr.onload = function (e) {
if (this.status == 200) {
var blob = this.response;
var filename = "设备导出{0}.xlsx".format(vpms.core.date.format("yyyyMMddhhmmss"));
var a = document.createElement('a');
blob.type = "application/excel";
var url = createObjectURL(blob);
a.href = url;
a.download = filename;
a.click();
window.URL.revokeObjectURL(url);
}
};
xhr.send(formData);
});The download using Chrome runs well, but the IE Explorer 11 version export Excel button does not respond or pops up "A new application is required to open this blob" .
Improve the blob processing method: as follows
if (window.navigator.msSaveOrOpenBlob) {
navigator.msSaveBlob(blob, filename);
} else {
var a = document.createElement('a');
blob.type = "application/excel";
var url = createObjectURL(blob);
a.href = url;
a.download = filename;
a.click();
window.URL.revokeObjectURL(url);
}At this time, the export under IE is normal:
The above is what I compiled for everyone The simple operation of JS download file stream, I hope it will be helpful to everyone in the future.
Related articles:
About a simple call to obtain JSON data in JS (the code is attached, simple and crude)
How to use JS to submit a request using POST method (detailed answer combined with the code)
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