Add more user error handling

3 files changed, 14 insertions, 3 deletions

diff --git a/hybring.cr b/hybring.cr
index 1c5015e..4b37469 100644
--- a/hybring.cr
+++ b/hybring.cr
@@ -60,6 +60,7 @@ end
 
 File.write "index.xhtml", page
 server = HTTP::Server.new do |context|
+  # Manually crafted request
   next http_error context, 405 if context.request.method != "POST"
   content_length = context.request.content_length
   next http_error context, 411 unless content_length
@@ -73,6 +74,9 @@ server = HTTP::Server.new do |context|
     params[key] = value
     case key
     when "nick"
+      if /^[0-9a-z]+$/ !~ value
+        next errors["nick"] = "Must be ASCII lowercase alphanumeric"
+      end
     when "opennic"
       uri = URI.parse value
       next errors["opennic"] = "Must be absolute URL" unless uri.absolute?
@@ -95,9 +99,16 @@ server = HTTP::Server.new do |context|
       break invalid_param = true
     end
   end
+
+  # Manually crafted request
   next http_error context, 400, "Invalid Parameter" if invalid_param
+  next http_error context, 400, "Missing Parameter" unless params.size == 3
 
-  context.response.status_code = 400 unless errors.empty?
+  if errors.empty?
+    # TODO: write feed
+  else
+    context.response.status_code = 400 unless errors.empty?
+  end
   context.response.content_type = "application/xhtml+xml"
   context.response.print page errors, params
   # TODO: schedule dynamic check
diff --git a/style.css b/style.css
index 395c35d..938af97 100644
--- a/style.css
+++ b/style.css
@@ -2,7 +2,7 @@ html {
     margin: auto;
     max-width: 72ch;
 }
-h1, h2, h3, h4, h5, h6 { margin-bottom: 1ex }
+h1, h2, h3, h4, h5, h6 { margin: 1ex 0 }
 form {
     display: grid;
     grid-template-columns: max-content 1fr;
diff --git a/xhtml.cr b/xhtml.cr
index 2dc8aea..4fd58eb 100644
--- a/xhtml.cr
+++ b/xhtml.cr
@@ -58,7 +58,7 @@ def form(xml, errors = {} of String => String,
          params = {} of String => String)
   # FIXME: get URL from configuration
   xml.element "form", action: "http://127.0.0.1:8080", method: "POST" do
-    input xml, "nick", "Nickname", "digits and ASCII lowercase letters",
+    input xml, "nick", "Nickname", "digits and lowercase letters",
       errors.fetch("nick", nil), params.fetch("nick", nil)
     input xml, "opennic", "OpenNIC URL", "e.g. http://example.null",
       errors.fetch("opennic", nil), params.fetch("opennic", nil)