HTTP test code in C using POST request returns 405 status code - c

Question

I have written a test code that first connects to a web server. It then requests a page, which has a login form, using GET. The GET works and a 200 status code is returned from the web server. After retrieving the page, I attempt to send a POST request to send some log in information but instead receive a 405 METHOD_NOT_ALLOWED status code in return.
Here is the code for sending the GET:
char data[273] = "GET /login HTTP/1.1\r\nHost: www.minecraft.net\r\nUser-Agent: Web-sniffer/1.0.37 (+http://web-sniffer.net/)\r\nAccept-Charset: ISO-8859-1,UTF-8;q=0.7,*;q=0.7\r\nCache-Control: no-cache\r\nAccept-Language: de,en;q=0.7,en-us;q=0.3\r\nReferer: http://web-sniffer.net/\r\n\r\n";
if ((val = send(sockfd, &data,272,0)) == -1){
perror("send");
}
And here is the code containing the POST command, username and password are changed so no personal information is given out:
char data2[405] = "POST /login HTTP/1.1\r\nHost: www.minecraft.net\r\nConnection: close\r\nUser-Agent: Web-sniffer/1.0.37 (+http://web-sniffer.net/)\r\nAccept-Charset: ISO-8859-1,UTF-8;q=0.7,*;q=0.7\r\nCache-Control: no-cache\r\nAccept-Language: de,en;q=0.7,en-us;q=0.3\r\nReferer: http://web-sniffer.net/\r\nContent-type: application/x-www-form-urlencoded\r\nContent-length: 38\r\n\r\nusername=ausername&password=apassword";
if ((val = send(sockfd, &data2,404,0)) == -1){
perror("send");
}
To make the packets readable:
GET /login HTTP/1.1[CRLF]
Host: www.minecraft.net[CRLF]
User-Agent: Web-sniffer/1.0.37 (+http://web-sniffer.net/)[CRLF]
Accept-Charset: ISO-8859-1,UTF-8;q=0.7,*;q=0.7[CRLF]
Cache-Control: no-cache[CRLF]
Accept-Language: de,en;q=0.7,en-us;q=0.3[CRLF]
Referer: http://web-sniffer.net/[CRLF]
[CRLF]
And the POST packet:
POST /login HTTP/1.1[CRLF]
Host: www.minecraft.net[CRLF]
Connection: close[CRLF]
User-Agent: Web-sniffer/1.0.37 (+http://web-sniffer.net/)[CRLF]
Accept-Charset: ISO-8859-1,UTF-8;q=0.7,*;q=0.7[CRLF]
Cache-Control: no-cache[CRLF]
Accept-Language: de,en;q=0.7,en-us;q=0.3[CRLF]
Referer: http://web-sniffer.net/[CRLF]
Content-type: application/x-www-form-urlencoded[CRLF]
Content-length: 38[CRLF]
[CRLF]
username=ausername&password=apassword
As you may notice, the User-Agent is Web-sniffer as I used web-sniffer.net to make these packets, which worked on their website as the POST command there returned a 302 FOUND status code.
I am wondering why this behavior is observed here when the exact same packets worked on web-sniffer.net, yet don't work here.