GH-45: dasht-server-http: serve file:// over HTTP

bin/dasht-server-http

@@ -73,6 +73,25 @@ url=$(awk '
   /^\r$/ { exit } # reached end of HTTP request
 ')
 
+# intercept and serve up file:// URLs over HTTP
+# TODO: also handle /favicon.ico and other URLs
+case "$url" in (/file://*)
+  file=${url#*:}  # strip file:// protocol
+  file=${file%#*} # strip any URI fragment
+
+  if test -f "$file"; then
+    printf 'HTTP/1.0 200 OK\r\n'
+    printf 'Content-Type: %s\r\n' "$(file -bi "$file")"
+    printf '\r\n'
+    cat "$file"
+  else
+    printf 'HTTP/1.0 404 Not Found\r\n'
+    printf '\r\n'
+  fi
+
+  exit
+;;esac
+
 # parse URL query parameters as shell variables
 eval "$(
   # split URL on query parameter delimiters (?&)
@@ -184,7 +203,10 @@ HEADER
 if test $1 -eq 0; then
   # notify user when no docsets are installed so they can go install them
   echo "<h1><i>${docsets_html}</i> docsets not installed so <i>$query_html</i> not searched</h1>"
-elif ! dasht-query-html "$query" $docsets; then
+elif results_html=$(dasht-query-html "$query" $docsets); then
+  # translate local file:// URLs into HTTP ones so that we can serve them
+  echo "$results_html" | sed 's,href=",&/,'
+else
   # notify user when no results are found so they can refine their search
   echo "<h1><i>$query_html</i> not found in $1 docsets matching <i>${docsets_html:-.*}</i></h1>"
 fi