ensure AUR RPC URI length is less than 8190 bytes

pacaur

@@ -944,9 +944,24 @@ getcachedpkg() {
 }
 
 downloadjson() {
+    aururl="https://aur.archlinux.org/rpc.php?type=multiinfo&v=2"
     urlencodedpkgs=($(sed 's/+/%2b/g' <<< $@ | sed 's/@/%40/g')) # pkgname consists of alphanum@._+-
     urlargs="$(printf "&arg[]=%s" "${urlencodedpkgs[@]}")"
-    curl -sfg --compressed -C 0 "https://aur.archlinux.org/rpc.php?type=multiinfo$urlargs&v=2" -o "$tmpdir/rpc.json" || note "e" $"Could not connect to the AUR"
+    # ensure the URI length is less than 8190 bytes (52 for AUR path, 13 reserved)
+    if [[ "${#urlargs}" -lt 8125 ]]; then
+        curl -sfg --compressed -C 0 "$aururl$urlargs" -o "$tmpdir/rpc.json" || note "e" $"Could not connect to the AUR"
+    else
+        urlpkgs=("$@")
+        urlencodedpkgs1=($(sed 's/+/%2b/g' <<< ${urlpkgs[@]:0:$((${#urlpkgs[@]}/2))} | sed 's/@/%40/g'))
+        urlencodedpkgs2=($(sed 's/+/%2b/g' <<< ${urlpkgs[@]:$((${#urlpkgs[@]}/2))} | sed 's/@/%40/g'))
+        urlargs1="$(printf "&arg[]=%s" "${urlencodedpkgs1[@]}")"
+        urlargs2="$(printf "&arg[]=%s" "${urlencodedpkgs2[@]}")"
+        curl -sfg --compressed -C 0 "$aururl$urlargs1" -o "$tmpdir/rpc1.json" "$aururl$urlargs2" -o "$tmpdir/rpc2.json" || note "e" $"Could not connect to the AUR"
+        # merge json files
+        json_reformat < "$tmpdir/rpc1.json" | head -n -2 | sed -r 's/}$/},/g' | sed -r "s/\"resultcount\": [0-9]+/\"resultcount\": \"\?\"/g" > "$tmpdir/rpc.json"
+        json_reformat < "$tmpdir/rpc2.json" | tail -n +6 >> "$tmpdir/rpc.json"
+        rm -f "$tmpdir/rpc1.json" "$tmpdir/rpc2.json"
+    fi
 }
 
 getjsonvar() {