Download a csv-file

Question

I’m using the Wizfi210 along with a Arduino. called my “unit” My unit is set up as a webbserver with Adhoc to the pc. I can connect to the unit via the pc and browse to it through the browser. So the HTTP-request/response is working just fine. Now, I need to download a file (a small csv-file in this case) . So i would like some help with the HTTP-response-header that should be send. Found several different solutions on the net, but none seemed to work for me. I got close, but not all the way Here is one of them: Serial.println(“

Sending HTTP RESPONSE WITH CSV-file”); Serial.println(“HTTP/1.1 200 OK
”); Serial.println(“Content-Type: application/CSV”); //text/plain Serial.println(“content-disposition: attachment; filename="myfileName.csv"”); // Serial.print(“Content-Type: text/csv”); // Serial.print(“
”); Serial.println(“Content-Length: 1000”); // Serial.println(“Connection: close”); // Serial.println(“Refresh: 5”); // refresh the page automatically every 5 sec // Serial.print(“”); // Serial.print(“
”); // Serial.println(“Content-Type: text/csv”); // Serial.println(); Could you please assist me with the proper HTTP-response? I know the size of the csv-file before sending. This is quite urgent, so please help me ASAP.

hobbex · Answer

an update: After some testing, i almost got this working: HTTP/1.1 200 OK Content-Description: File Transfer" Content-Type: application/force-download Content-Type: application/CSV content-disposition attachment;filename=“myfile.csv” Pragma: public Pragma: no-cache Content-Length: 20 
 1;2;3;4;5;6;7:8;9;0;
" The browser starts to download a file, however, the filename is not “myfile.csv”. Any ideas why the "content-disposition attachment;filename=“myfile.csv” is not working?

ssekim · Answer

Hello Hobbex At first, I’m not good at HTTP-protocol but WizFi210/WiFi. So, I think that you had better ask in HTTP-protocol-community. BTW, in general, about the below issue, you need to do as below. capture the http-packets between the web server and web-browser with such a Wireshark. Analysis of the packets emulate the http-packets with WizFi210 Thanks

hobbex · Answer

Thanc ssekim… i found the problem: content-disposition attachment;filename=“myfile.csv” a “:” is missing after disposition. it should be: content-disposition: attachment;filename=“myfile.csv”