python - FLASK: Serving file to browser behind API proxy -

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when user enters http://example2.com:5500/?param=x code below generates data.csv file , serves browser. works this.

however, have deployed behind api proxy, user makes call http://example1.com/?param=x internally transformed http://example2.com:5500/?param=x.

as result, instead of serving data.csv browser before, displays on browser data.csv content. view source-code feature shows data.csv should contain, without html headers, data.csv content, not being served attachement. ideas?

from flask import make_response  @app.route('/', methods = ['get']) def get_file():      alldata = []      while len(new_data) > 0:             new_data = api.timeline(max_id=oldest)             alldata.extend(new_data)             oldest = alldata[-1].id - 1          outdata = ""     data in alldata:             outdata += ",".join(data) + "\n"      response = make_response(outdata)     response.headers["content-disposition"] = "attachment; filename=data.csv"      return response   if __name__ == '__main__':   app.run(host = app.config['host'], port = app.config['port'])

edit: included mapping code transform request example1.com example2.com (secret_url)

# example1.com @app.route("/api/<projecttitle>/<path:urlsuffix>", methods=['get']) def projecttitlepage(projecttitle, urlsuffix):      projectid = databasefunctions.gettitleprojectid(projecttitle)     projectinfo = databasefunctions.getprojectinfo(projectid)     redirectionquerystring = re.sub('apikey=[^&]+&?', '', request.query_string).rstrip('&')     redirectionurl = projectinfo['secreturl'].rstrip('/')     if urlsuffix not none:         redirectionurl += '/' + urlsuffix.rstrip('/')     redirectionurl += '/?' + redirectionquerystring     redirectionheaders = request.headers      print request.args.to_dict(flat=false)     try:         r = requests.get(redirectionurl, data=request.args.to_dict(flat=false), headers=redirectionheaders)     except exception, e:         return '/error=error: bad secret url: ' + projectinfo.get('secreturl')      return r.text

your homegrown proxy not returning headers application. try this:

@app.route("/api/<projecttitle>/<path:urlsuffix>", methods=['get']) def projecttitlepage(projecttitle, urlsuffix):      # ...      return r.text, r.status_code, r.headers

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