1 files changed, 66 insertions, 2 deletions

diff --git a/gemini/client.go b/gemini/client.go
index 0a5dd76..c60e92e 100644
--- a/gemini/client.go
+++ b/gemini/client.go
@@ -7,6 +7,8 @@ import (
 	"io"
 	"net"
 	neturl "net/url"
+	"strconv"
+	"strings"
 
 	"tildegit.org/tjp/sliderule/internal/types"
 )
@@ -48,7 +50,7 @@ var ExceededMaxRedirects = errors.New("gemini.Client: exceeded MaxRedirects")
 // This method will not automatically follow redirects or cache permanent failures or
 // redirects.
 func (client Client) RoundTrip(request *types.Request) (*types.Response, error) {
-	if request.Scheme != "gemini" && request.Scheme != "" {
+	if request.Scheme != "gemini" && request.Scheme != "titan" && request.Scheme != "" {
 		return nil, errors.New("non-gemini protocols not supported")
 	}
 
@@ -72,7 +74,33 @@ func (client Client) RoundTrip(request *types.Request) (*types.Response, error)
 	st := conn.ConnectionState()
 	request.TLSState = &st
 
-	if _, err := conn.Write([]byte(request.URL.String() + "\r\n")); err != nil {
+	destURL := *request.URL
+
+	var body []byte
+	if request.Scheme == "titan" {
+		var err error
+		if bodyrdr, ok := request.Meta.(io.Reader); ok {
+			body, err = io.ReadAll(bodyrdr)
+			if err != nil {
+				return nil, err
+			}
+			if err := close(request.Meta); err != nil {
+				return nil, err
+			}
+
+			path, params := pathparams(destURL.Path)
+			params["size"] = strconv.Itoa(len(body))
+			destURL.Path = assemblepath(path, params)
+		} else {
+			body = []byte{}
+		}
+	}
+
+	if _, err := conn.Write([]byte(destURL.String() + "\r\n")); err != nil {
+		return nil, err
+	}
+
+	if _, err := conn.Write(body); err != nil {
 		return nil, err
 	}
 
@@ -124,3 +152,39 @@ func (c Client) Fetch(url string) (*types.Response, error) {
 func (c Client) IsRedirect(response *types.Response) bool {
 	return ResponseCategoryForStatus(response.Status) == ResponseCategoryRedirect
 }
+
+func pathparams(basepath string) (string, map[string]string) {
+	params := map[string]string{}
+	path, paramstr, found := strings.Cut(basepath, ";")
+	if !found {
+		return path, params
+	}
+
+	for _, pairstr := range strings.Split(paramstr, ";") {
+		key, val, found := strings.Cut(pairstr, "=")
+		if found {
+			params[key] = val
+		}
+	}
+
+	return path, params
+}
+
+func assemblepath(basepath string, params map[string]string) string {
+	path := strings.Builder{}
+	_, _ = path.WriteString(basepath)
+	for key, val := range params {
+		_ = path.WriteByte(';')
+		_, _ = path.WriteString(key)
+		_ = path.WriteByte('=')
+		_, _ = path.WriteString(val)
+	}
+	return path.String()
+}
+
+func close(closer any) error {
+	if cl, ok := closer.(io.Closer); ok {
+		return cl.Close()
+	}
+	return nil
+}