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| 1 | +package love.wangqi.codec; |
| 2 | + |
| 3 | +import io.netty.buffer.ByteBuf; |
| 4 | +import io.netty.buffer.Unpooled; |
| 5 | +import io.netty.handler.codec.http.*; |
| 6 | +import io.netty.handler.codec.http.multipart.DefaultHttpDataFactory; |
| 7 | +import io.netty.handler.codec.http.multipart.HttpDataFactory; |
| 8 | +import io.netty.handler.codec.http.multipart.HttpPostRequestEncoder; |
| 9 | +import io.netty.handler.codec.http.multipart.InterfaceHttpData; |
| 10 | +import org.slf4j.Logger; |
| 11 | +import org.slf4j.LoggerFactory; |
| 12 | +import love.wangqi.exception.NoRouteException; |
| 13 | +import love.wangqi.route.Route; |
| 14 | +import love.wangqi.route.RouteMapper; |
| 15 | + |
| 16 | +import java.net.URI; |
| 17 | +import java.net.URL; |
| 18 | +import java.nio.charset.StandardCharsets; |
| 19 | +import java.util.List; |
| 20 | +import java.util.Map; |
| 21 | + |
| 22 | +/** |
| 23 | + * @author: wangqi |
| 24 | + * @description: |
| 25 | + * @date: Created in 2018/5/29 下午7:08 |
| 26 | + */ |
| 27 | +public class DefaultHttpRequestBuilder implements HttpRequestBuilder { |
| 28 | + private static final Logger logger = LoggerFactory.getLogger(DefaultHttpRequestBuilder.class); |
| 29 | + |
| 30 | + private RouteMapper routeMapper; |
| 31 | + private FullHttpRequest originRequest; |
| 32 | + private HttpRequest newRequest; |
| 33 | + private HttpPostRequestEncoder newBodyRequestEncoder; |
| 34 | + |
| 35 | + protected HttpRequestDecomposer httpRequestDecomposer; |
| 36 | + |
| 37 | + HttpDataFactory factory = new DefaultHttpDataFactory(DefaultHttpDataFactory.MINSIZE); |
| 38 | + |
| 39 | + public class RequestHolder { |
| 40 | + public URL url; |
| 41 | + public HttpRequest request; |
| 42 | + public HttpPostRequestEncoder bodyRequestEncoder; |
| 43 | + |
| 44 | + public RequestHolder(URL url, HttpRequest request, HttpPostRequestEncoder bodyRequestEncoder) { |
| 45 | + this.url = url; |
| 46 | + this.request = request; |
| 47 | + this.bodyRequestEncoder = bodyRequestEncoder; |
| 48 | + } |
| 49 | + } |
| 50 | + |
| 51 | + public DefaultHttpRequestBuilder() { |
| 52 | + } |
| 53 | + |
| 54 | + @Override |
| 55 | + public DefaultHttpRequestBuilder setRouteMapper(RouteMapper routeMapper) { |
| 56 | + this.routeMapper = routeMapper; |
| 57 | + return this; |
| 58 | + } |
| 59 | + |
| 60 | + @Override |
| 61 | + public DefaultHttpRequestBuilder setOriginRequest(FullHttpRequest originRequest) { |
| 62 | + this.originRequest = originRequest; |
| 63 | + this.httpRequestDecomposer = new HttpRequestDecomposer(originRequest); |
| 64 | + return this; |
| 65 | + } |
| 66 | + |
| 67 | + @Override |
| 68 | + public Route getRoute() { |
| 69 | + return routeMapper.getRoute(this.originRequest); |
| 70 | + } |
| 71 | + |
| 72 | + @Override |
| 73 | + public RequestHolder build() throws Exception { |
| 74 | + Route route = getRoute(); |
| 75 | + if (route == null) { |
| 76 | + throw new NoRouteException(); |
| 77 | + } |
| 78 | + URL url = route.getMapUrl(); |
| 79 | + logger.info(url.toString()); |
| 80 | + |
| 81 | + // 请求路径 |
| 82 | + QueryStringEncoder queryStringEncoder = new QueryStringEncoder(url.getPath()); |
| 83 | + // 请求参数 |
| 84 | + buildParams(route).forEach((key, values) -> { |
| 85 | + values.forEach(value -> { |
| 86 | + queryStringEncoder.addParam(key, value); |
| 87 | + }); |
| 88 | + }); |
| 89 | + newRequest = new DefaultFullHttpRequest(originRequest.protocolVersion(), originRequest.method(), new URI(queryStringEncoder.toString()).toASCIIString()); |
| 90 | + // 请求头 |
| 91 | + buildHeaders(route).forEach((key, values) -> { |
| 92 | + values.forEach(value -> { |
| 93 | + newRequest.headers().set(key, value); |
| 94 | + }); |
| 95 | + }); |
| 96 | + newRequest.headers().remove(HttpHeaderNames.COOKIE); |
| 97 | + newRequest.headers().set(HttpHeaderNames.HOST, url.getHost()); |
| 98 | + |
| 99 | + // 请求体 |
| 100 | + String contentType = httpRequestDecomposer.getContentType(); |
| 101 | + if (contentType != null) { |
| 102 | + if (contentType.startsWith("application/json")) { |
| 103 | + ByteBuf bbuf = Unpooled.copiedBuffer(buildContentJson(route), StandardCharsets.UTF_8); |
| 104 | + newRequest.headers().set(HttpHeaderNames.CONTENT_LENGTH, bbuf.readableBytes()); |
| 105 | + ((FullHttpRequest)newRequest).content().writeBytes(bbuf); |
| 106 | + } else if (contentType.startsWith("application/x-www-form-urlencoded")) { |
| 107 | + HttpPostRequestEncoder requestEncoder = new HttpPostRequestEncoder(newRequest, false); |
| 108 | + buildContentFormUrlEncoded(route).forEach((key, values) -> { |
| 109 | + values.forEach(value -> { |
| 110 | + try { |
| 111 | + requestEncoder.addBodyAttribute(key, value); |
| 112 | + } catch (HttpPostRequestEncoder.ErrorDataEncoderException e) { |
| 113 | + logger.error(e.getMessage()); |
| 114 | + } |
| 115 | + }); |
| 116 | + }); |
| 117 | + newRequest = (FullHttpRequest) requestEncoder.finalizeRequest(); |
| 118 | + } else if (contentType.startsWith("multipart/form-data")) { |
| 119 | + HttpPostRequestEncoder requestEncoder = new HttpPostRequestEncoder(factory, newRequest, true); |
| 120 | + for (InterfaceHttpData data : buildContentFormdata(route)) { |
| 121 | + if (data.getHttpDataType() == InterfaceHttpData.HttpDataType.Attribute) { |
| 122 | + requestEncoder.addBodyHttpData(data); |
| 123 | + } else if (data.getHttpDataType() == InterfaceHttpData.HttpDataType.FileUpload) { |
| 124 | + requestEncoder.addBodyHttpData(data); |
| 125 | + } |
| 126 | + } |
| 127 | + HttpRequest hr = requestEncoder.finalizeRequest(); |
| 128 | + newRequest = hr; |
| 129 | + newBodyRequestEncoder = requestEncoder; |
| 130 | + } else { |
| 131 | + ByteBuf bbuf = buildContentOther(route); |
| 132 | + newRequest.headers().set(HttpHeaderNames.CONTENT_LENGTH, bbuf.readableBytes()); |
| 133 | + ((FullHttpRequest)newRequest).content().writeBytes(bbuf); |
| 134 | + } |
| 135 | + } |
| 136 | + return new RequestHolder(url, newRequest, newBodyRequestEncoder); |
| 137 | + } |
| 138 | + |
| 139 | + /** |
| 140 | + * 返回path（不包含?后面的参数部分） |
| 141 | + * @return |
| 142 | + */ |
| 143 | + protected String buildPath(Route route) { |
| 144 | + return httpRequestDecomposer.getPath(); |
| 145 | + } |
| 146 | + |
| 147 | + /** |
| 148 | + * 返回请求的请求参数 |
| 149 | + * @return |
| 150 | + */ |
| 151 | + protected Map<String, List<String>> buildParams(Route route) { |
| 152 | + return httpRequestDecomposer.getParams(); |
| 153 | + } |
| 154 | + |
| 155 | + /** |
| 156 | + * 返回请求的请求头 |
| 157 | + * @return |
| 158 | + */ |
| 159 | + protected Map<String, List<String>> buildHeaders(Route route) { |
| 160 | + return httpRequestDecomposer.getHeaders(); |
| 161 | + } |
| 162 | + |
| 163 | + /** |
| 164 | + * 如果content-type为application/json，获取请求体 |
| 165 | + * @return |
| 166 | + */ |
| 167 | + protected String buildContentJson(Route route) { |
| 168 | + return httpRequestDecomposer.getContentJsonAsString(); |
| 169 | + } |
| 170 | + |
| 171 | + /** |
| 172 | + * 如果content-type为application/x-www-form-urlencoded，获取请求体 |
| 173 | + * @return |
| 174 | + */ |
| 175 | + protected Map<String, List<String>> buildContentFormUrlEncoded(Route route) { |
| 176 | + return httpRequestDecomposer.getContentFormUrlEncoded(); |
| 177 | + } |
| 178 | + |
| 179 | + /** |
| 180 | + * 如果content-type为multipart/form-data，获取请求体 |
| 181 | + * @return |
| 182 | + */ |
| 183 | + protected List<InterfaceHttpData> buildContentFormdata(Route route) { |
| 184 | + return httpRequestDecomposer.getContentFormdata(); |
| 185 | + } |
| 186 | + |
| 187 | + /** |
| 188 | + * 其他类型的content-type则直接返回相应的ByteBuf |
| 189 | + * @return |
| 190 | + */ |
| 191 | + private ByteBuf buildContentOther(Route route) { |
| 192 | + return httpRequestDecomposer.getContentOther(); |
| 193 | + } |
| 194 | + |
| 195 | +} |
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