client: Better request handling, client certificates support

src/client.jl

@@ -1,13 +1,22 @@
 import Base.get
-function get(request::Request)
+function get(request::Request; certs::Union{CAChain,Nothing} = nothing)
+    req = string(request)
+    let len = sizeof(req)
+        if len > 1024
+            throw(OverflowError(
+                "Maximum <URL> size is 1024 bytes (yours is $len)!"))
+        end
+    end
+    data = string(req, "\r\n")
     ctx = OpenSSL.SSLContext(mode = OpenSSL.ClientMode)
+    # Use certificates, if provided
+    isnothing(certs) || Gemenon.OpenSSL.ca_chain!(ctx, certs.cert, certs.key)
+
     io = Sockets.connect(request.host, request.port)
 
     client = SSLClient(ctx, io)
-    isreadable(io)
+    OpenSSL.do_ssl_handshake(client)
-
+    
-    status = OpenSSL.do_ssl_handshake(client)
-
     while true
         if isreadable(io) && length(client.write_buf) == 0
             # verbose && println("do_read")
@@ -23,7 +32,7 @@ function get(request::Request)
         end
         # verbose && println("end loop")
         if OpenSSL.ssl_init_finished(client)
-            write(client, string(request, "\r\n"))
+            write(client, data)
             while isopen(io)
                 # println("HERE")
                 OpenSSL.do_sock_read(client)
@@ -32,5 +41,3 @@ function get(request::Request)
         end
     end
 end
-
-