implemented attachment downloading

ui/amcontext.go

@@ -33,6 +33,7 @@ import (
 
 // AmContext is the interface for Amsterdam's wrapper context that exposes the required functionality.
 type AmContext interface {
+	AddHeader(string, string)
 	ClearCommunityContext()
 	ClearLoginCookie()
 	ClearSession()
@@ -59,6 +60,7 @@ type AmContext interface {
 	ReplaceUser(*database.User)
 	SaveSession() error
 	SetCommunityContext(string) error
+	SetHeader(string, string)
 	SetLeftMenu(string)
 	SetLoginCookie(string)
 	SetOutputType(string)
@@ -96,6 +98,11 @@ type amContext struct {
 	isMemberLocked bool
 }
 
+// AddHeader adds a header to the response.
+func (c *amContext) AddHeader(key, value string) {
+	c.echoContext.Response().Header().Add(key, value)
+}
+
 // ClearCommunityContext clears the community context so changes will be reflected.
 func (c *amContext) ClearCommunityContext() {
 	c.community = nil
@@ -343,6 +350,11 @@ func (c *amContext) SetCommunityContext(param string) error {
 	return nil
 }
 
+// SetHeader sets a header on the output.
+func (c *amContext) SetHeader(key, value string) {
+	c.echoContext.Response().Header().Set(key, value)
+}
+
 // SetLeftMenu sets the current topmost left menu name value.
 func (c *amContext) SetLeftMenu(name string) {
 	c.session.Set("leftMenu", name)

ui/render_wrap.go

@@ -13,7 +13,9 @@ package ui
 import (
 	"fmt"
 	"net/http"
+	"time"
 
+	"github.com/klauspost/lctime"
 	"github.com/labstack/echo/v4"
 	log "github.com/sirupsen/logrus"
 )
@@ -89,6 +91,9 @@ func ErrorPage(ctxt AmContext, input_err error) (string, any, error) {
 	return "framed_template", "error.jet", nil
 }
 
+// expireTime is the expiration time sent in the dynamic headers.
+var expireTime string = lctime.Strftime("%c", time.Unix(1, 0))
+
 /* AmWrap wraps the Amsterdam handler function in a wrapper that implements the spec for
  * Echo handler functions.
  * Parameters:
@@ -99,6 +104,12 @@ func ErrorPage(ctxt AmContext, input_err error) (string, any, error) {
 func AmWrap(myfunc func(AmContext) (string, any, error)) echo.HandlerFunc {
 	return func(ctxt echo.Context) error {
 		amctxt := AmContextFromEchoContext(ctxt)
+
+		// Add the dynamic headers.
+		ctxt.Response().Header().Set("Pragma", "No-cache")
+		ctxt.Response().Header().Set("Cache-Control", "no-cache")
+		ctxt.Response().Header().Set("Expires", expireTime)
+
 		// Exec the wrapped function.
 		what, rc, err := myfunc(amctxt)
 		if err == nil {

ui/views/singlepost.jet

@@ -21,7 +21,7 @@
             <a href="/user/{{ post_userName }}" target="_blank" class="text-blue-700 hover:text-blue-900">{{ post_userName }}</a>, 
             {{ DisplayDateTime(post_cur.Posted, .) }}</em>)
             {{ if post_attach.Filename != "" }}
-                <a href="/TODO" title="(Attachment {{ post_attach.Filename }} - {{ post_attach.Length }} bytes)"
+                <a href="/attachment/{{ post_cur.PostId }}" title="(Attachment {{ post_attach.Filename }} - {{ post_attach.Length }} bytes)"
                     {{ if hasPrefix(post_attach.MIMEType, "text/") || hasPrefix(post_attach.MIMEType, "image/" )}}
                         target="_blank"
                     {{ end }}