diff --git a/Plugins/Flow.Launcher.Plugin.WebSearch/Settings.cs b/Plugins/Flow.Launcher.Plugin.WebSearch/Settings.cs index 6cf1446af..f0e5ac327 100644 --- a/Plugins/Flow.Launcher.Plugin.WebSearch/Settings.cs +++ b/Plugins/Flow.Launcher.Plugin.WebSearch/Settings.cs @@ -197,7 +197,8 @@ namespace Flow.Launcher.Plugin.WebSearch public SuggestionSource[] Suggestions { get; set; } = { new Google(), new Baidu(), - new Bing() + new Bing(), + new DuckDuckGo() }; [JsonIgnore] diff --git a/Plugins/Flow.Launcher.Plugin.WebSearch/SuggestionSources/DuckDuckGo.cs b/Plugins/Flow.Launcher.Plugin.WebSearch/SuggestionSources/DuckDuckGo.cs new file mode 100644 index 000000000..8fafb44cc --- /dev/null +++ b/Plugins/Flow.Launcher.Plugin.WebSearch/SuggestionSources/DuckDuckGo.cs @@ -0,0 +1,54 @@ +using System; +using System.Collections.Generic; +using System.Linq; +using System.Threading.Tasks; +using Flow.Launcher.Infrastructure.Http; +using Flow.Launcher.Infrastructure.Logger; +using System.Net.Http; +using System.Threading; +using System.Text.Json; + +namespace Flow.Launcher.Plugin.WebSearch.SuggestionSources +{ + public class DuckDuckGo : SuggestionSource + { + public override async Task> SuggestionsAsync(string query, CancellationToken token) + { + // When the search query is empty, DuckDuckGo returns `[]`. When it's not empty, it returns data + // in the following format: `["query", ["suggestion1", "suggestion2", ...]]`. + if (string.IsNullOrEmpty(query)) + { + return new List(); + } + + try + { + const string api = "https://duckduckgo.com/ac/?type=list&q="; + + await using var resultStream = await Http.GetStreamAsync(api + Uri.EscapeDataString(query), token: token).ConfigureAwait(false); + + using var json = await JsonDocument.ParseAsync(resultStream, cancellationToken: token); + + var results = json.RootElement.EnumerateArray().ElementAt(1); + + return results.EnumerateArray().Select(o => o.GetString()).ToList(); + + } + catch (Exception e) when (e is HttpRequestException or {InnerException: TimeoutException}) + { + Log.Exception("|DuckDuckGo.Suggestions|Can't get suggestion from DuckDuckGo", e); + return null; + } + catch (JsonException e) + { + Log.Exception("|DuckDuckGo.Suggestions|can't parse suggestions", e); + return new List(); + } + } + + public override string ToString() + { + return "DuckDuckGo"; + } + } +}