当使用拦截器获取Response.body.string()后，后面的操作就直接返回Failed了，是因为流只能被使用一次的原因，破解如下
灵感HttpLoggingInterceptor
public final class HttpLoggingInterceptor implements Interceptor { private static final Charset UTF8 = Charset.forName("UTF-8"); @Override public Response intercept(Chain chain) throws IOException { Level level = this.level; Request request = chain.request(); //如果Log Level 级别为NONOE，则不打印，直接返回 if (level == Level.NONE) { return chain.proceed(request); } //是否打印body boolean logBody = level == Level.BODY; //是否打印header boolean logHeaders = logBody || level == Level.HEADERS; //获得请求body RequestBody requestBody = request.body(); //请求body是否为空 boolean hasRequestBody = requestBody != null; //获得Connection，内部有route、socket、handshake、protocol方法 Connection connection = chain.connection(); //如果Connection为null，返回HTTP_1_1，否则返回connection.protocol() Protocol protocol = connection != null ? connection.protocol() : Protocol.HTTP_1_1; //比如: --> POST http://121.40.227.8:8088/api http/1.1 String requestStartMessage = "--> " + request.method() + ' ' + request.url() + ' ' + protocol; if (!logHeaders && hasRequestBody) { requestStartMessage += " (" + requestBody.contentLength() + "-byte body)"; } logger.log(requestStartMessage); //打印 Request if (logHeaders) { if (hasRequestBody) { // Request body headers are only present when installed as a network interceptor. Force // them to be included (when available) so there values are known. if (requestBody.contentType() != null) { logger.log("Content-Type: " + requestBody.contentType()); } if (requestBody.contentLength() != -1) { logger.log("Content-Length: " + requestBody.contentLength()); } } Headers headers = request.headers(); for (int i = 0, count = headers.size(); i < count; i++) { String name = headers.name(i); // Skip headers from the request body as they are explicitly logged above. if (!"Content-Type".equalsIgnoreCase(name) && !"Content-Length".equalsIgnoreCase(name)) { logger.log(name + ": " + headers.value(i)); } } if (!logBody || !hasRequestBody) { logger.log("--> END " + request.method()); } else if (bodyEncoded(request.headers())) { logger.log("--> END " + request.method() + " (encoded body omitted)"); } else { Buffer buffer = new Buffer(); requestBody.writeTo(buffer); //编码设为UTF-8 Charset charset = UTF8; MediaType contentType = requestBody.contentType(); if (contentType != null) { charset = contentType.charset(UTF8); } logger.log(""); if (isPlaintext(buffer)) { logger.log(buffer.readString(charset)); logger.log("--> END " + request.method() + " (" + requestBody.contentLength() + "-byte body)"); } else { logger.log("--> END " + request.method() + " (binary " + requestBody.contentLength() + "-byte body omitted)"); } } } //打印 Response long startNs = System.nanoTime(); Response response; try { response = chain.proceed(request); } catch (Exception e) { logger.log("<-- HTTP FAILED: " + e); throw e; } long tookMs = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startNs); ResponseBody responseBody = response.body(); long contentLength = responseBody.contentLength(); String bodySize = contentLength != -1 ? contentLength + "-byte" : "unknown-length"; //比如 <-- 200 OK http://121.40.227.8:8088/api (36ms) logger.log("<-- " + response.code() + ' ' + response.message() + ' ' + response.request().url() + " (" + tookMs + "ms" + (!logHeaders ? ", " + bodySize + " body" : "") + ')'); if (logHeaders) { Headers headers = response.headers(); for (int i = 0, count = headers.size(); i < count; i++) { logger.log(headers.name(i) + ": " + headers.value(i)); } if (!logBody || !HttpEngine.hasBody(response)) { logger.log("<-- END HTTP"); } else if (bodyEncoded(response.headers())) { logger.log("<-- END HTTP (encoded body omitted)"); } else { BufferedSource source = responseBody.source(); source.request(Long.MAX_VALUE); // Buffer the entire body. Buffer buffer = source.buffer(); Charset charset = UTF8; MediaType contentType = responseBody.contentType(); if (contentType != null) { try { charset = contentType.charset(UTF8); } catch (UnsupportedCharsetException e) { logger.log(""); logger.log("Couldn't decode the response body; charset is likely malformed."); logger.log("<-- END HTTP"); return response; } } if (!isPlaintext(buffer)) { logger.log(""); logger.log("<-- END HTTP (binary " + buffer.size() + "-byte body omitted)"); return response; } if (contentLength != 0) { logger.log(""); //获取Response的body的字符串 并打印 logger.log(buffer.clone().readString(charset)); } logger.log("<-- END HTTP (" + buffer.size() + "-byte body)"); } } return response; } /** * Returns true if the body in question probably contains human readable text. Uses a small sample * of code points to detect unicode control characters commonly used in binary file signatures. */ static boolean isPlaintext(Buffer buffer) throws EOFException { try { Buffer prefix = new Buffer(); long byteCount = buffer.size() < 64 ? buffer.size() : 64; buffer.copyTo(prefix, 0, byteCount); for (int i = 0; i < 16; i++) { if (prefix.exhausted()) { break; } int codePoint = prefix.readUtf8CodePoint(); if (Character.isISOControl(codePoint) && !Character.isWhitespace(codePoint)) { return false; } } return true; } catch (EOFException e) { return false; // Truncated UTF-8 sequence. } } private boolean bodyEncoded(Headers headers) { String contentEncoding = headers.get("Content-Encoding"); return contentEncoding != null && !contentEncoding.equalsIgnoreCase("identity"); } }
修改
public class MyInterceptor implements Interceptor { private static final Charset UTF8 = Charset.forName("UTF-8"); @Override public Response intercept(Chain chain) throws IOException { Request request = chain.request(); Response response = chain.proceed(request); ResponseBody responseBody = response.body(); long contentLength = responseBody.contentLength(); //注意 >>>>>>>>> okhttp3.4.1这里变成了 !HttpHeader.hasBody(response) //if (!HttpEngine.hasBody(response)) { if(!HttpHeaders.hasBody(response)){ //HttpHeader -> 改成了 HttpHeaders，看版本进行选择 //END HTTP } else if (bodyEncoded(response.headers())) { //HTTP (encoded body omitted) } else { BufferedSource source = responseBody.source(); source.request(Long.MAX_VALUE); // Buffer the entire body. Buffer buffer = source.buffer(); Charset charset = UTF8; MediaType contentType = responseBody.contentType(); if (contentType != null) { try { charset = contentType.charset(UTF8); } catch (UnsupportedCharsetException e) { //Couldn't decode the response body; charset is likely malformed. return response; } } if (!isPlaintext(buffer)) { L.i("<-- END HTTP (binary " + buffer.size() + "-byte body omitted)"); return response; } if (contentLength != 0) { String result = buffer.clone().readString(charset); //获取到response的body的string字符串 //do something .... <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< } L.i("<-- END HTTP (" + buffer.size() + "-byte body)"); } return response; } static boolean isPlaintext(Buffer buffer) throws EOFException { try { Buffer prefix = new Buffer(); long byteCount = buffer.size() < 64 ? buffer.size() : 64; buffer.copyTo(prefix, 0, byteCount); for (int i = 0; i < 16; i++) { if (prefix.exhausted()) { break; } int codePoint = prefix.readUtf8CodePoint(); if (Character.isISOControl(codePoint) && !Character.isWhitespace(codePoint)) { return false; } } return true; } catch (EOFException e) { return false; // Truncated UTF-8 sequence. } } private boolean bodyEncoded(Headers headers) { String contentEncoding = headers.get("Content-Encoding"); return contentEncoding != null && !contentEncoding.equalsIgnoreCase("identity"); } }