C Socket write HTTP GET request: error 400 -

C Socket write HTTP GET request: error 400 -

i writing little programme read finance info download.finance.yahoo.com using sockets in c. socket connection seem work fine.

i can't seem right command read info yahoo. programme reads fine google.com, can read pages example.

the request:

char resource[str_size]; strcpy(resource, "get "); strcat(resource, argv[3]); //argv[3]=="/d/quotes.csv?s=goog&f=nsl1op" strcat(resource, "\r\n"); ... write(fd, resource, strlen(resource));

this info in body of page receive when trying request yahoo:

status code : 400 host header required host machine: r04.ycpi.ams.yahoo.net timestamp: 1413383465.000 url: http:///d/quotes.csv?s=goog

how should string formated work yahoo?

when read error message , info in respone can see problem is:

the error message "host header required" , url "http:///d/quotes.csv?s=goog", hostname should added in request,

char resource[str_size]; strcpy(resource, "get "); strcat(resource, "download.finance.yahoo.com"); // or add together argument or variable strcat(resource, argv[3]); //argv[3]=="/d/quotes.csv?s=goog&f=nsl1op" strcat(resource, "\r\n"); ... write(fd, resource, strlen(resource));

c sockets httprequest