在利用okhttp进行网络请求时,通常会用到拦截器Interceptor这个东西。但是为请求链接添加拦截器又分为三种添加,第一种:添加请求头,第二种:GET请求添加公共参数,第三种:POST请求添加公共参数。一下就是添加的方法
首先创建一个类实现Interceptor:
public class HttpInterceptorimplements Interceptor{}
然后就是各个添加的方法:
最后在OkhttpClient中添加拦截器:
添加请求头方法:
/*//新请求(为什么说新操作是从旧请求里面提取内容信息)
Request.Builder requestBuilder=oldRequest.newBuilder();
requestBuilder.method(oldRequest.method(),oldRequest.body());
//将公共参数添加到请求头header中去
if (mHeaderParamsMap.size()>0){//如果添加了请求头公共参数,Map.size>0
//遍历集合,将参数添加到请求头header中
for (Map.Entry params:mHeaderParamsMap.entrySet()){
requestBuilder.header(params.getKey(),params.getValue());
}
}
//将公共参数添加到请求头后,建立新请求连接
Request newRequest=requestBuilder.build();*/
GET请求添加公共参数方法:
//获取并判断网络请求的方法
String method = oldRequest.method();
if (method.equals("GET") && mUrlParamsMap.size() > 0) {//判断,并且判断是否有添加公共参数请求
//添加公共参数,构建一个新的httpurl请求链接
HttpUrl modifieUrl = null;//注意:就算下面没有添加公共参数成功,也会执行下去的
//遍历map集合,将公共参数添加到url中
modifieUrl=oldRequest.url().newBuilder().build();
for (Map.Entry<String, String> params : mUrlParamsMap.entrySet()) {
modifieUrl = modifieUrl.newBuilder()
.addQueryParameter(params.getKey(), params.getValue())
.build();
}
//初始化新的request请求链接
newRequest = oldRequest.newBuilder().url(modifieUrl).build();
//再次发起网络请求,并获得返回的结果
Response response = chain.proceed(newRequest);
String content = response.body().string();//拿到返回结果的内容,进行分析
//获得返回结果的类型
MediaType contentType = response.body().contentType();
//生成新的response返回。注意:如果网络请求的response,如果去除后直接返回,将会抛异常
//注意:response只去一次值,取完后立即清空销毁,所以最好别在这打印日志
//Log.e("okhttp", "执行拦截添加" + content);
return response.newBuilder()
.body(ResponseBody.create(content, contentType))
.build();
}
POST请求添加公共参数方法:
if (method.equals("POST")) {
if (oldRequest.body() instanceof FormBody) {
FormBody.Builder bodyBuilder = new FormBody.Builder();//Charset.forName("UTF-8")
FormBody formBody = (FormBody) oldRequest.body();
for (int i = 0; i < formBody.size(); i++) {//---------------注意:一定需要将原来的参数添加到FormBody.Builder里面,等全部参数添加完后,再生成新连接
//Log.e("okhttp","formbody里面的参数:"+i+formBody.name(i)+":"+formBody.value(i));
bodyBuilder.add(formBody.name(i), formBody.value(i));
}
for (Map.Entry<String, String> params : mUrlParamsMap.entrySet()) {
//原本写法
//formBody=bodyBuilder.add(params.getKey(),params.getValue()).build();
//修改
//POST请求方法添加公共参数
bodyBuilder.add(params.getKey(), params.getValue());
//Log.e("okhttp","公共参数Post"+params.getKey()+":"+params.getValue());
}
StringBuffer sb = new StringBuffer();
formBody = bodyBuilder.build();//修改
for (int i = 0; i < formBody.size(); i++) {
//Log.e("okhttp","body里面的参数:"+i+formBody.name(i)+":"+formBody.value(i));
sb.append(formBody.name(i)+"="+formBody.value(i)+"&");
}
RequestBody requestBody = RequestBody.create(FORM_CONTENT_TYPE, sb.toString());
//.addHeader("Content-Type","application/x-www-form-urlencoded; charset=utf-8")
newRequest = oldRequest.newBuilder().post(requestBody).build();
Response response = chain.proceed(newRequest);
String content = response.body().string();
MediaType contentType = response.body().contentType();
//Log.e("okhttp","执行拦截添加Post"+content+":"+newRequest.toString());
printUrl(newRequest, formBody);
return response.newBuilder()
.body(ResponseBody.create(content, contentType))
.build();
}
}
最后这里把整个代码贴上来:
package com.gn.gdsjjf.baselib.net.interceptor;
import com.gn.gdsjjf.baselib.net.NetConstant;
import com.gn.gdsjjf.baselib.utils.LogUtil;
import org.jetbrains.annotations.NotNull;
import java.io.IOException;
import java.net.URLEncoder;
import java.nio.charset.Charset;
import java.util.HashMap;
import java.util.Map;
import okhttp3.FormBody;
import okhttp3.HttpUrl;
import okhttp3.Interceptor;
import okhttp3.MediaType;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import okhttp3.ResponseBody;
public class AddParamsIterceptor implements Interceptor {
//创建map集合,将添加的公共参数保存到map中
private Map<String, String> mUrlParamsMap = new HashMap<>();
public static final MediaType FORM_CONTENT_TYPE
= MediaType.parse("application/x-www-form-urlencoded; charset=UTF-8");
/*//创建map集合,保存添加到请求头的公共参数,添加公共请求头也一样
private Map<String,String> mHeaderParamsMap=new HashMap<>();*/
@NotNull
@Override
public Response intercept(@NotNull Chain chain) throws IOException {
//获得请求连接
Request oldRequest = chain.request();//旧连接
Request newRequest;//添加公共参数后的新连接
/**
* 这个时添加请求头的
*/
/*//新请求(为什么说新操作是从旧请求里面提取内容信息)
Request.Builder requestBuilder=oldRequest.newBuilder();
requestBuilder.method(oldRequest.method(),oldRequest.body());
//将公共参数添加到请求头header中去
if (mHeaderParamsMap.size()>0){//如果添加了请求头公共参数,Map.size>0
//遍历集合,将参数添加到请求头header中
for (Map.Entry<String,String> params:mHeaderParamsMap.entrySet()){
requestBuilder.header(params.getKey(),params.getValue());
}
}
//将公共参数添加到请求头后,建立新请求连接
Request newRequest=requestBuilder.build();*/
//获取并判断网络请求的方法
String method = oldRequest.method();
if (method.equals("GET") && mUrlParamsMap.size() > 0) {//判断,并且判断是否有添加公共参数请求
//添加公共参数,构建一个新的httpurl请求链接
HttpUrl modifieUrl = null;//注意:就算下面没有添加公共参数成功,也会执行下去的
//遍历map集合,将公共参数添加到url中
modifieUrl=oldRequest.url().newBuilder().build();
for (Map.Entry<String, String> params : mUrlParamsMap.entrySet()) {
modifieUrl = modifieUrl.newBuilder()
.addQueryParameter(params.getKey(), params.getValue())
.build();
}
//初始化新的request请求链接
newRequest = oldRequest.newBuilder().url(modifieUrl).build();
//再次发起网络请求,并获得返回的结果
Response response = chain.proceed(newRequest);
String content = response.body().string();//拿到返回结果的内容,进行分析
//获得返回结果的类型
MediaType contentType = response.body().contentType();
//生成新的response返回。注意:如果网络请求的response,如果去除后直接返回,将会抛异常
//注意:response只去一次值,取完后立即清空销毁,所以最好别在这打印日志
//Log.e("okhttp", "执行拦截添加" + content);
return response.newBuilder()
.body(ResponseBody.create(content, contentType))
.build();
} else if (method.equals("POST")) {
if (oldRequest.body() instanceof FormBody) {
FormBody.Builder bodyBuilder = new FormBody.Builder();//Charset.forName("UTF-8")
FormBody formBody = (FormBody) oldRequest.body();
for (int i = 0; i < formBody.size(); i++) {//---------------注意:一定需要将原来的参数添加到FormBody.Builder里面,等全部参数添加完后,再生成新连接
//Log.e("okhttp","formbody里面的参数:"+i+formBody.name(i)+":"+formBody.value(i));
bodyBuilder.add(formBody.name(i), formBody.value(i));
}
for (Map.Entry<String, String> params : mUrlParamsMap.entrySet()) {
//原本写法
//formBody=bodyBuilder.add(params.getKey(),params.getValue()).build();
//修改
//POST请求方法添加公共参数
bodyBuilder.add(params.getKey(), params.getValue());
//Log.e("okhttp","公共参数Post"+params.getKey()+":"+params.getValue());
}
StringBuffer sb = new StringBuffer();
formBody = bodyBuilder.build();//修改
for (int i = 0; i < formBody.size(); i++) {
//Log.e("okhttp","body里面的参数:"+i+formBody.name(i)+":"+formBody.value(i));
sb.append(formBody.name(i)+"="+formBody.value(i)+"&");
}
RequestBody requestBody = RequestBody.create(FORM_CONTENT_TYPE, sb.toString());
//.addHeader("Content-Type","application/x-www-form-urlencoded; charset=utf-8")
newRequest = oldRequest.newBuilder().post(requestBody).build();
Response response = chain.proceed(newRequest);
String content = response.body().string();
MediaType contentType = response.body().contentType();
//Log.e("okhttp","执行拦截添加Post"+content+":"+newRequest.toString());
printUrl(newRequest, formBody);
return response.newBuilder()
.body(ResponseBody.create(content, contentType))
.build();
}
}
return chain.proceed(oldRequest);
}
/**
* 打印请求链接
*
* @param newRequest
* @param formBody
*/
private void printUrl(Request newRequest, FormBody formBody) {
StringBuilder sb = new StringBuilder(newRequest.url() + "");
for (int i = 0; i < formBody.size(); i++) {
sb.append(formBody.encodedName(i) + "=" + formBody.encodedValue(i) + "&");
}
sb.deleteCharAt(sb.length() - 1);
if (NetConstant.debug) {
LogUtil.e("请求链接", sb.toString());
}
}
/**
* 创建一个静态类,用于添加公共参数到map集合缓存
*/
public static class Builder {
//创建拦截器对象,得到Map存储添加进来的公共参数
AddParamsIterceptor addParamsIterceptor;
public Builder() {//构造方法中初始话拦截器
addParamsIterceptor = new AddParamsIterceptor();
}
/**
* 将公共参数添加到map集合
*
* @param key
* @param value
* @return
*/
public Builder addUrlParams(String key, String value) {
addParamsIterceptor.mUrlParamsMap.put(key, value);
return this;
}
public Builder addUrlParams(String key, double value) {
return addUrlParams(key, String.valueOf(value));
}
public Builder addUrlParams(String key, int value) {
return addUrlParams(key, String.valueOf(value));
}
public Builder addUrlParams(String key, long value) {
return addUrlParams(key, String.valueOf(value));
}
public Builder addUrlParams(String key, float value) {
return addUrlParams(key, String.valueOf(value));
}
/**
* 返回建立拦截器
*
* @return
*/
public AddParamsIterceptor build() {
return addParamsIterceptor;
}
}
}
小小的尝试,希望对各位有用,如果又哪里需要改正的地方,请多多指教!谢谢
参考链接:https://blog.csdn.net/qq_38450133/article/details/81218114
网友评论