我需要通过ajax从服务器下载文件。问题在于这个文件并没有存储在服务器上。我的基于Java的后端会根据请求参数自动生成文件,并将其放在响应体中返回:
@RequestMapping(value = "/download", method = RequestMethod.GET)
public void download(@RequestParam String description, @RequestParam Long logId, HttpServletResponse response) {
try {
InputStream fileContent = // getting file as byte stream
response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
response.setHeader("Content-Disposition", "attachment; filename=file.zip");
ServletOutputStream responseOutputStream = response.getOutputStream();
org.apache.commons.io.IOUtils.copy(fileContent, responseOutputStream);
response.flushBuffer();
} catch (IOException e) {
logger.error("Attempt to download file failed", e);
}
}
所以我需要处理它并允许用户下载文件。 我的客户端包含以下内容:
$.ajax({
type: "GET",
url: "/download",
data: {
description: "test",
logId: 123
},
success: function(data) {
var blob = new Blob([data]);
var link = document.createElement('a');
link.href = window.URL.createObjectURL(blob);
link.download = "file.zip";
link.click();
}
})
控制器返回文件,但是什么也没有发生。我做错了什么?