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feat: Disk cache supports Gson as well.
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283 changes: 283 additions & 0 deletions
283
src/main/java/io/github/nstdio/http/ext/GsonMetadataSerializer.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,283 @@ | ||
| /* | ||
| * Copyright (C) 2022 Edgar Asatryan | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| package io.github.nstdio.http.ext; | ||
|
|
||
| import com.google.gson.Gson; | ||
| import com.google.gson.GsonBuilder; | ||
| import com.google.gson.TypeAdapter; | ||
| import com.google.gson.stream.JsonReader; | ||
| import com.google.gson.stream.JsonWriter; | ||
| import io.github.nstdio.http.ext.ImmutableResponseInfo.ResponseInfoBuilder; | ||
| import lombok.RequiredArgsConstructor; | ||
|
|
||
| import java.io.IOException; | ||
| import java.net.URI; | ||
| import java.net.http.HttpClient; | ||
| import java.net.http.HttpHeaders; | ||
| import java.net.http.HttpRequest; | ||
| import java.net.http.HttpResponse.ResponseInfo; | ||
| import java.nio.file.Files; | ||
| import java.nio.file.Path; | ||
| import java.time.Clock; | ||
| import java.time.Duration; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
|
|
||
| import static io.github.nstdio.http.ext.MetadataSerializationFields.FIELD_NAME_CODE; | ||
| import static io.github.nstdio.http.ext.MetadataSerializationFields.FIELD_NAME_HEADERS; | ||
| import static io.github.nstdio.http.ext.MetadataSerializationFields.FIELD_NAME_REQUEST; | ||
| import static io.github.nstdio.http.ext.MetadataSerializationFields.FIELD_NAME_REQUEST_TIME; | ||
| import static io.github.nstdio.http.ext.MetadataSerializationFields.FIELD_NAME_RESPONSE; | ||
| import static io.github.nstdio.http.ext.MetadataSerializationFields.FIELD_NAME_RESPONSE_TIME; | ||
| import static io.github.nstdio.http.ext.MetadataSerializationFields.FIELD_NAME_VERSION; | ||
| import static io.github.nstdio.http.ext.MetadataSerializationFields.FILED_NAME_REQUEST_METHOD; | ||
| import static io.github.nstdio.http.ext.MetadataSerializationFields.FILED_NAME_REQUEST_TIMEOUT; | ||
| import static io.github.nstdio.http.ext.MetadataSerializationFields.FILED_NAME_REQUEST_URI; | ||
| import static java.net.http.HttpRequest.BodyPublishers.noBody; | ||
|
|
||
| class GsonMetadataSerializer implements MetadataSerializer { | ||
| private final Gson gson; | ||
|
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| GsonMetadataSerializer() { | ||
| var headers = new HttpHeadersTypeAdapter(); | ||
| var request = new HttpRequestTypeAdapter(headers); | ||
| var response = new ResponseInfoTypeAdapter(headers); | ||
|
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| gson = new GsonBuilder() | ||
| .disableHtmlEscaping() | ||
| .registerTypeAdapter(CacheEntryMetadata.class, new CacheEntryMetadataTypeAdapter(request, response)) | ||
| .create(); | ||
| } | ||
|
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| @Override | ||
| public void write(CacheEntryMetadata metadata, Path path) { | ||
| try (var out = Files.newBufferedWriter(path)) { | ||
| gson.toJson(metadata, out); | ||
| } catch (IOException ignored) { | ||
| } | ||
| } | ||
|
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| @Override | ||
| public CacheEntryMetadata read(Path path) { | ||
| try (var out = Files.newBufferedReader(path)) { | ||
| return gson.fromJson(out, CacheEntryMetadata.class); | ||
| } catch (IOException ignored) { | ||
| return null; | ||
| } | ||
| } | ||
|
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| private static class HttpHeadersTypeAdapter extends TypeAdapter<HttpHeaders> { | ||
|
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| @Override | ||
| public void write(JsonWriter out, HttpHeaders value) throws IOException { | ||
| out.beginObject(); | ||
|
|
||
| for (var entry : value.map().entrySet()) { | ||
| out.name(entry.getKey()).beginArray(); | ||
|
|
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| for (String headerValue : entry.getValue()) { | ||
| out.value(headerValue); | ||
| } | ||
|
|
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| out.endArray(); | ||
| } | ||
|
|
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| out.endObject(); | ||
| } | ||
|
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| @Override | ||
| public HttpHeaders read(JsonReader in) throws IOException { | ||
| in.beginObject(); | ||
| var builder = new HttpHeadersBuilder(); | ||
|
|
||
| while (in.hasNext()) { | ||
| String name = in.nextName(); | ||
| List<String> values = new ArrayList<>(1); | ||
|
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| in.beginArray(); | ||
| while (in.hasNext()) { | ||
| String value = in.nextString(); | ||
| values.add(value); | ||
| } | ||
| in.endArray(); | ||
|
|
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| builder.setTrusted(name, values); | ||
| } | ||
|
|
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| in.endObject(); | ||
| return builder.build(); | ||
| } | ||
| } | ||
|
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| @RequiredArgsConstructor | ||
| private static class HttpRequestTypeAdapter extends TypeAdapter<HttpRequest> { | ||
| private final TypeAdapter<HttpHeaders> headersTypeAdapter; | ||
|
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| @Override | ||
| public void write(JsonWriter out, HttpRequest value) throws IOException { | ||
| out.beginObject(); | ||
|
|
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| out.name(FILED_NAME_REQUEST_URI).value(value.uri().toASCIIString()); | ||
| out.name(FILED_NAME_REQUEST_METHOD).value(value.method()); | ||
|
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| String timeoutString = value.timeout().map(Duration::toString).orElse(null); | ||
| if (timeoutString != null) { | ||
| out.name(FILED_NAME_REQUEST_TIMEOUT).value(timeoutString); | ||
| } | ||
| Integer versionOrd = value.version().map(Enum::ordinal).orElse(null); | ||
| if (versionOrd != null) { | ||
| out.name(FIELD_NAME_VERSION).value(versionOrd); | ||
| } | ||
|
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| out.name(FIELD_NAME_HEADERS); | ||
| headersTypeAdapter.write(out, value.headers()); | ||
|
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| out.endObject(); | ||
| } | ||
|
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| @Override | ||
| public HttpRequest read(JsonReader in) throws IOException { | ||
| in.beginObject(); | ||
| HttpRequest.Builder builder = HttpRequest.newBuilder(); | ||
|
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| while (in.hasNext()) { | ||
| switch (in.nextName()) { | ||
| case FILED_NAME_REQUEST_METHOD: | ||
| builder.method(in.nextString(), noBody()); | ||
| break; | ||
| case FILED_NAME_REQUEST_TIMEOUT: | ||
| builder.timeout(Duration.parse(in.nextString())); | ||
| break; | ||
| case FIELD_NAME_VERSION: | ||
| int version = in.nextInt(); | ||
| builder.version(HttpClient.Version.values()[version]); | ||
| break; | ||
| case FILED_NAME_REQUEST_URI: | ||
| builder.uri(URI.create(in.nextString())); | ||
| break; | ||
| case FIELD_NAME_HEADERS: | ||
| HttpHeaders headers = headersTypeAdapter.read(in); | ||
| headers.map().forEach((name, values) -> values.forEach(value -> builder.header(name, value))); | ||
| break; | ||
| } | ||
| } | ||
|
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| in.endObject(); | ||
|
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| return builder.build(); | ||
| } | ||
| } | ||
|
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| @RequiredArgsConstructor | ||
| private static class ResponseInfoTypeAdapter extends TypeAdapter<ResponseInfo> { | ||
| private final TypeAdapter<HttpHeaders> headersTypeAdapter; | ||
|
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| @Override | ||
| public void write(JsonWriter out, ResponseInfo value) throws IOException { | ||
| out.beginObject(); | ||
|
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| out.name(FIELD_NAME_CODE).value(value.statusCode()); | ||
| out.name(FIELD_NAME_VERSION).value(value.version().ordinal()); | ||
|
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| out.name(FIELD_NAME_HEADERS); | ||
| headersTypeAdapter.write(out, value.headers()); | ||
|
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| out.endObject(); | ||
| } | ||
|
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| @Override | ||
| public ResponseInfo read(JsonReader in) throws IOException { | ||
| in.beginObject(); | ||
| ResponseInfoBuilder builder = ImmutableResponseInfo.builder(); | ||
| String fieldName; | ||
|
|
||
| while (in.hasNext()) { | ||
| fieldName = in.nextName(); | ||
|
|
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| switch (fieldName) { | ||
| case FIELD_NAME_CODE: | ||
| builder.statusCode(in.nextInt()); | ||
| break; | ||
| case FIELD_NAME_VERSION: | ||
| int version = in.nextInt(); | ||
| builder.version(HttpClient.Version.values()[version]); | ||
| break; | ||
| case FIELD_NAME_HEADERS: | ||
| HttpHeaders headers = headersTypeAdapter.read(in); | ||
| builder.headers(headers); | ||
| break; | ||
| } | ||
| } | ||
|
|
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| in.endObject(); | ||
|
|
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| return builder.build(); | ||
| } | ||
| } | ||
|
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| @RequiredArgsConstructor | ||
| private static class CacheEntryMetadataTypeAdapter extends TypeAdapter<CacheEntryMetadata> { | ||
| private final TypeAdapter<HttpRequest> requestTypeAdapter; | ||
| private final TypeAdapter<ResponseInfo> responseTypeAdapter; | ||
|
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| @Override | ||
| public void write(JsonWriter out, CacheEntryMetadata value) throws IOException { | ||
| out.beginObject(); | ||
|
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| out.name(FIELD_NAME_REQUEST_TIME).value(value.requestTime()); | ||
| out.name(FIELD_NAME_RESPONSE_TIME).value(value.responseTime()); | ||
|
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| out.name(FIELD_NAME_REQUEST); | ||
| requestTypeAdapter.write(out, value.request()); | ||
|
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| out.name(FIELD_NAME_RESPONSE); | ||
| responseTypeAdapter.write(out, value.response()); | ||
|
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| out.endObject(); | ||
| } | ||
|
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| @Override | ||
| public CacheEntryMetadata read(JsonReader in) throws IOException { | ||
| in.beginObject(); | ||
|
|
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| long requestTime = -1; | ||
| long responseTime = -1; | ||
| HttpRequest request = null; | ||
| ResponseInfo response = null; | ||
|
|
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| while (in.hasNext()) { | ||
| switch (in.nextName()) { | ||
| case FIELD_NAME_REQUEST_TIME: | ||
| requestTime = in.nextLong(); | ||
| break; | ||
| case FIELD_NAME_RESPONSE_TIME: | ||
| responseTime = in.nextLong(); | ||
| break; | ||
| case FIELD_NAME_REQUEST: | ||
| request = requestTypeAdapter.read(in); | ||
| break; | ||
| case FIELD_NAME_RESPONSE: | ||
| response = responseTypeAdapter.read(in); | ||
| break; | ||
| } | ||
| } | ||
|
|
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| in.endObject(); | ||
| return CacheEntryMetadata.of(requestTime, responseTime, response, request, Clock.systemUTC()); | ||
| } | ||
| } | ||
| } |
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