一.python 函数返回式下载，话不多说上代码
def xxx(request):
filename=''
fp = open(filename,'rb')
mydata = fp.read()
fp.close()
response = HttpResponse(mydata, mimetype='application/octet-stream')
response['Content-Disposition'] = 'attachment; filename="%s"'%filename.split('/')[-1]
return response
直接读取所要下载内容，response 文件内容和要保存的文件名就ok.
二.字段解析
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disposition := "Content-Disposition" ":"
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disposition- type
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*( ";" disposition-parm)
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disposition- type := "inline"
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/ "attachment"
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/ extension-token
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; values are not case-sensitive
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disposition-parm := filename-parm / parameter
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filename-parm := "filename" "=" value;
Content-Disposition属性有两种类型：inline 和 attachment inline ：将文件内容直接显示在页面 attachment：弹出对话框让用户下载具体例子：
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Content- Type: image/jpeg 可选
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Content-Disposition: inline;filename=hello.jpg
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Content-Description: just a small picture of me
在页面内打开代码：
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File file = new File("rfc1806.txt");
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String filename = file.getName();
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response.setHeader("Content-Type","text/plain");
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response.addHeader("Content-Disposition","inline;filename=" + new String(filename.getBytes(),"utf-8"));
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response.addHeader("Content-Length","" + file.length());
弹出保存框代码：
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File file = new File("rfc1806.txt");
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String filename = file.getName();
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response.setHeader("Content-Type","text/plain");
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response.addHeader("Content-Disposition","attachment;filename=" + new String(filename.getBytes(),"utf-8"));
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response.addHeader("Content-Length","" + file.length());python