diff --git a/src/main.rs b/src/main.rs
index 3cc13f9..0548f2e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -125,11 +125,11 @@ fn parse_start_line(input: &str) -> Result<StartLine, Vec<u8>> {
         .for_each(|byte| response_body.push(*byte));
 
         response_field_lines.insert(
-            String::from("Content-Length"),
+            String::from("content-length"),
             vec![response_body.len().to_string()],
         );
         response_field_lines.insert(
-            String::from("Content-Type"),
+            String::from("content-type"),
             vec![String::from("text/plain")],
         );
 
@@ -168,11 +168,11 @@ fn parse_start_line(input: &str) -> Result<StartLine, Vec<u8>> {
             .for_each(|byte| response_body.push(*byte));
 
         response_field_lines.insert(
-            String::from("Content-Length"),
+            String::from("content-length"),
             vec![response_body.len().to_string()],
         );
         response_field_lines.insert(
-            String::from("Content-Type"),
+            String::from("content-type"),
             vec![String::from("text/plain")],
         );
 
@@ -204,13 +204,13 @@ fn parse_start_line(input: &str) -> Result<StartLine, Vec<u8>> {
     Ok(start_line)
 }
 
-//TODO: Be able to parse this
-// Accept: text/html, application/xhtml+xml, application/xml;q=0.9, */*;q=0.8
-// Be careful of optional whitespace (OWS)
-// q=x.yyy is basically a which I want most value the closer to 1 the better. If no q=x.yyy was specified, then q=1 is implied.
+// Example -> Accept: text/html, application/xhtml+xml, application/xml;q=0.9, */*;q=0.8
+// Be careful of optional whitespace (OWS) and CRLF
+// q=x.yyy is basically a value which says, what the client wants most.
+// The closer to 1 the better. If no q=x.yyy was specified, then q=1 is implied.
 // This basically mean I should sort the vector by qvalue. So that the one it wants most, is at the beginning.
 fn parse_field_line(field_line: (&str, &str)) -> (String, Vec<String>) {
-    let field_name = field_line.0.to_owned();
+    let field_name = field_line.0.to_ascii_lowercase();
     let mut fuck: HashMap<String, Vec<String>> = HashMap::new();
 
     if !field_line.1.contains(",") {
@@ -290,11 +290,11 @@ fn parse_field_lines(
                 .for_each(|byte| response_body.push(*byte));
 
             response_field_lines.insert(
-                String::from("Content-Length"),
+                String::from("content-length"),
                 vec![response_body.len().to_string()],
             );
             response_field_lines.insert(
-                String::from("Content-Type"),
+                String::from("content-type"),
                 vec![String::from("text/plain")],
             );
 
@@ -319,11 +319,11 @@ fn parse_field_lines(
                     .for_each(|byte| response_body.push(*byte));
 
                 response_field_lines.insert(
-                    String::from("Content-Length"),
+                    String::from("content-length"),
                     vec![response_body.len().to_string()],
                 );
                 response_field_lines.insert(
-                    String::from("Content-Type"),
+                    String::from("content-type"),
                     vec![String::from("text/plain")],
                 );
 
@@ -339,18 +339,18 @@ fn parse_field_lines(
         field_lines.insert(field_line.0, field_line.1);
     }
 
-    if !field_lines.contains_key(&String::from("Host")) {
-        "field-line with key HOST is missing"
+    if !field_lines.contains_key(&String::from("host")) {
+        "field-line with field-name -> host is missing"
             .as_bytes()
             .iter()
             .for_each(|byte| response_body.push(*byte));
 
         response_field_lines.insert(
-            String::from("Content-Length"),
+            String::from("content-length"),
             vec![response_body.len().to_string()],
         );
         response_field_lines.insert(
-            String::from("Content-Type"),
+            String::from("content-type"),
             vec![String::from("text/plain")],
         );
 
@@ -415,7 +415,7 @@ fn response_builder(
     response
 }
 
-fn try_get_file(start_line: &StartLine, _field_lines: &HashMap<String, Vec<String>>) -> Vec<u8> {
+fn try_get_file(start_line: &StartLine, field_lines: &HashMap<String, Vec<String>>) -> Vec<u8> {
     let mut response_field_lines: HashMap<String, Vec<String>> = HashMap::new();
     let mut response_body: Vec<u8> = vec![];
 
@@ -424,28 +424,45 @@ fn try_get_file(start_line: &StartLine, _field_lines: &HashMap<String, Vec<Strin
         _ => PathBuf::from(format!("/www{}", start_line.target)),
     };
 
-    // TODO: Check if wanted file is contained in the optional Accept field-line
-    // https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Accept for reference
-    // let mime_type = match MimeGuess::from_path(&path).first_raw() {
-    //     Some(val) => val,
-    //     _ => {
-    //         return response_builder(RequestMethods::HEAD, "HTTP/1.1 500 ", None, None);
-    //     }
-    // }
-
     match fs::read(&path) {
         Ok(val) => {
             val.iter().for_each(|byte| response_body.push(*byte));
 
             response_field_lines.insert(
-                String::from("Content-Length"),
+                String::from("content-length"),
                 vec![response_body.len().to_string()],
             );
 
             let mime_type = mime_guess::from_path(&path)
-                .first_raw()
+                .first()
                 .expect("Could not guess mime-type from path");
-            response_field_lines.insert(String::from("Content-Type"), vec![mime_type.to_string()]);
+
+            if let Some(vector) = field_lines.get("accept") {
+                for value in vector {
+                    if mime_type.to_string() == *value {
+                        response_field_lines
+                            .insert(String::from("content-type"), vec![mime_type.to_string()]);
+                    }
+
+                    if format!("{}/*", mime_type.type_()) == *value {
+                        response_field_lines
+                            .insert(String::from("content-type"), vec![mime_type.to_string()]);
+                    }
+
+                    if "*/*" == *value {
+                        response_field_lines
+                            .insert(String::from("content-type"), vec![mime_type.to_string()]);
+                    }
+                }
+            } else {
+                response_field_lines
+                    .insert(String::from("content-type"), vec![mime_type.to_string()]);
+            }
+
+            if !response_field_lines.contains_key("content-type") {
+                // TODO: make better according to https://datatracker.ietf.org/doc/html/rfc9110#status.406
+                return response_builder(start_line.method, "HTTP/1.1 406 ", None, None);
+            }
 
             response_builder(
                 start_line.method,
@@ -478,11 +495,11 @@ fn handle_request(mut stream: TcpStream) -> Result<(), Box<dyn Error>> {
             .for_each(|byte| response_body.push(*byte));
 
         response_field_lines.insert(
-            String::from("Content-Length"),
+            String::from("content-length"),
             vec![response_body.len().to_string()],
         );
         response_field_lines.insert(
-            String::from("Content-Type"),
+            String::from("content-type"),
             vec![String::from("text/plain")],
         );
 
@@ -503,7 +520,7 @@ fn handle_request(mut stream: TcpStream) -> Result<(), Box<dyn Error>> {
             return Ok(());
         }
     };
-    dbg!(&start_line);
+    // dbg!(&start_line);
 
     let field_lines = match parse_field_lines(&mut reader) {
         Ok(val) => val,
@@ -512,7 +529,7 @@ fn handle_request(mut stream: TcpStream) -> Result<(), Box<dyn Error>> {
             return Ok(());
         }
     };
-    dbg!(&field_lines);
+    // dbg!(&field_lines);
 
     // let mut request_body: Vec<u8> = vec![];
     // reader.read_to_end(&mut request_body)?;