跟我學(xué)企業(yè)級(jí)flutter項(xiàng)目：dio網(wǎng)絡(luò)框架增加公共請(qǐng)求參數(shù)&header

前言

在開(kāi)發(fā)過(guò)程中，我們經(jīng)常會(huì)用到網(wǎng)絡(luò)請(qǐng)求，在flutter框架中，dio框架非常不錯(cuò)，所以今天的文章在dio的基礎(chǔ)上搭建一套網(wǎng)絡(luò)持久化框架，那么在flutter項(xiàng)目中如何搭建一套，高可用性，維護(hù)性較高的dio公共請(qǐng)求參數(shù)框架呢？

搭建前夕準(zhǔn)備

一、基本認(rèn)知

  1. 要持久化那么必然要有存儲(chǔ)設(shè)備
  2. 持久化的數(shù)據(jù)在app啟動(dòng)后要即使填充到項(xiàng)目中
  3. 由于項(xiàng)目中網(wǎng)絡(luò)請(qǐng)求地址繁多，類型不同，需要持久化的位置不同

二、基于基本認(rèn)知來(lái)找合適的工具&必要點(diǎn)

2.1 持久化的工具：

我的推薦

  1. mmkv
  2. share_prefresence

今天主要用講解mmkv版本

2.2必要點(diǎn)：

dio攔截器

攔截器是搭建這套持久化的關(guān)鍵

三、準(zhǔn)備好如上技能，我們來(lái)搭建這套持久化網(wǎng)絡(luò)框架吧

1、首先要知道有幾種類型的公共

  //請(qǐng)求中url后追加公共請(qǐng)求
  static const int urlPresistent = 1;
  //請(qǐng)求頭中追加公共請(qǐng)求
  static const int headerPresistent = 2;
  //全部都追加公共請(qǐng)求
  static const int allPresistent = 3;

2、構(gòu)建緩存參數(shù)（為了快速獲取）

  static Map<String,Map<String, String?>> headerPersistent = Map();
  static Map<String,Map<String, String?>> urlPersistent = Map();

3、構(gòu)建mmkv存儲(chǔ)結(jié)構(gòu)（加密存儲(chǔ)）

static MMKV _store(String baseUrl, int type) => MMKVStore.sysSafeMMKV(name: '${SysConfig.sysPersistent}${baseUrl}_${type.toString()}');

4、構(gòu)建基本函數(shù)

單健值對(duì)存儲(chǔ)

static void setPersistent(String baseUrl,String key,String? value,{int type = allPresistent}){
    if (type == allPresistent || type == headerPresistent) {
      if (!headerPersistent.containsKey(baseUrl)) {
        headerPersistent[baseUrl] = Map<String, String?>();
      }
      var keyMap = headerPersistent[baseUrl]!;
      keyMap[key] = value;
      _store(baseUrl, headerPresistent).encodeString(key, value??"");
    }
    if (type == allPresistent || type == urlPresistent) {
      if (!urlPersistent.containsKey(baseUrl)) {
        urlPersistent[baseUrl] = Map<String, String?>();
      }
      var keyMap = urlPersistent[baseUrl]!;
      keyMap[key] = value;
      _store(baseUrl, urlPresistent).encodeString(key, value??"");
    }
  }

多健值對(duì)存儲(chǔ)

static void setPersistentMap(String baseUrl,Map<String, String?> map,{int type = allPresistent}){
    if (type == allPresistent || type == headerPresistent) {
      if (!headerPersistent.containsKey(baseUrl)) {
        headerPersistent[baseUrl] = Map<String, String?>();
      }
      var keyMap = headerPersistent[baseUrl]!;
      keyMap.addAll(map);
      keyMap.forEach((key, value) {
        _store(baseUrl, headerPresistent).encodeString(key, value??"");
      });
    }
    if (type == allPresistent || type == urlPresistent) {
      if (!urlPersistent.containsKey(baseUrl)) {
        urlPersistent[baseUrl] = Map<String, String?>();
      }
      var keyMap = urlPersistent[baseUrl]!;
      keyMap.addAll(map);
      keyMap.forEach((key, value) {
        _store(baseUrl, urlPresistent).encodeString(key, value??"");
      });
    }
  }

參數(shù)獲?。?/p> 

  static Map<String, String?>? getPersistent(String baseUrl, {int type = allPresistent}) {
    Map<String, String?>? map;
    if (type == allPresistent || type == headerPresistent) {
      Map<String, String?>? headerMap;
      if (headerPersistent.containsKey(baseUrl)) {
        headerMap = headerPersistent[baseUrl];
      } else {
        headerMap = null;
      }
      if (headerMap != null) {
        if (map == null) {
          map = Map();
        }
        map.addAll(headerMap);
      }
    }
    if (type == allPresistent || type == urlPresistent) {
      Map<String, String?>? urlMap;
      if (urlPersistent.containsKey(baseUrl)) {
        urlMap = urlPersistent[baseUrl];
      } else {
        urlMap = null;
      }

      if (urlMap != null) {
        if (map == null) {
          map = Map();
        }
        map.addAll(urlMap);
      }
    }
    return map;
  }

刷新當(dāng)前緩存（應(yīng)用啟動(dòng)刷新）

  static Map<String, String?> _all(String baseurl, int type) {
    var mmkv= _store(baseurl, type);
    var keys = mmkv.allKeys;
    var map = Map<String, String?>();
    keys.forEach((element) {
      var value = mmkv.decodeString(element);
      map[element] = value;
    });
    return map;
  }

  static void flushPersistent(String baseurl, {int type = allPresistent}) {
    if (type == allPresistent || type == headerPresistent) {
      var map = _all(baseurl, headerPresistent);
      headerPersistent[baseurl]?.clear();

      if (!headerPersistent.containsKey(baseurl)) {
        headerPersistent[baseurl] = Map<String, String?>();
      }
      var keyMap = headerPersistent[baseurl]!;
      keyMap.addAll(map);
    }
    if (type == allPresistent || type == urlPresistent) {
      var map = _all(baseurl, urlPresistent);
      urlPersistent[baseurl]?.clear();
      if (!urlPersistent.containsKey(baseurl)) {
        urlPersistent[baseurl] = Map<String, String?>();
      }
      var keyMap = urlPersistent[baseurl]!;
      keyMap.addAll(map);
    }

  }

退出登陸移除持久化

static void removeAllPersistent(String baseurl, {int type = allPresistent}) {
    if (type == allPresistent || type == headerPresistent) {
      headerPersistent[baseurl]?.clear();
      _store(baseurl, headerPresistent).clearAll();
    }
    if (type == allPresistent || type == urlPresistent) {
      urlPersistent[baseurl]?.clear();
      _store(baseurl, urlPresistent).clearAll();
    }
  }

攔截器實(shí)現(xiàn)（dio請(qǐng)求攔截管理）

class PresistentInterceptor extends Interceptor {

  @override
  void onRequest(RequestOptions options, RequestInterceptorHandler handler) {
    var urlPersitents = HttpPersistent.getPersistent(options.baseUrl,type: HttpPersistent.urlPresistent);
    var headerPersitents = HttpPersistent.getPersistent(options.baseUrl,
        type: HttpPersistent.headerPresistent);
    headerPersitents?.forEach((key, value) {
      options.headers[key] = value;
    });

    urlPersitents?.forEach((key, value) {
      options.queryParameters[key] = value;
    });
    super.onRequest(options, handler);
  }

}

四、整體代碼&事件調(diào)用邏輯

整體代碼


class HttpPersistent{

  static const int urlPresistent = 1;
  static const int headerPresistent = 2;
  static const int allPresistent = 3;

  static MMKV _store(String baseUrl, int type) => MMKVStore.sysSafeMMKV(name: '${SysConfig.sysPersistent}${baseUrl}_${type.toString()}');
  static Map<String,Map<String, String?>> headerPersistent = Map();
  static Map<String,Map<String, String?>> urlPersistent = Map();

  static void setPersistent(String baseUrl,String key,String? value,{int type = allPresistent}){
    if (type == allPresistent || type == headerPresistent) {
      if (!headerPersistent.containsKey(baseUrl)) {
        headerPersistent[baseUrl] = Map<String, String?>();
      }
      var keyMap = headerPersistent[baseUrl]!;
      keyMap[key] = value;
      _store(baseUrl, headerPresistent).encodeString(key, value??"");
    }
    if (type == allPresistent || type == urlPresistent) {
      if (!urlPersistent.containsKey(baseUrl)) {
        urlPersistent[baseUrl] = Map<String, String?>();
      }
      var keyMap = urlPersistent[baseUrl]!;
      keyMap[key] = value;
      _store(baseUrl, urlPresistent).encodeString(key, value??"");
    }
  }

  static void setPersistentMap(String baseUrl,Map<String, String?> map,{int type = allPresistent}){
    if (type == allPresistent || type == headerPresistent) {
      if (!headerPersistent.containsKey(baseUrl)) {
        headerPersistent[baseUrl] = Map<String, String?>();
      }
      var keyMap = headerPersistent[baseUrl]!;
      keyMap.addAll(map);
      keyMap.forEach((key, value) {
        _store(baseUrl, headerPresistent).encodeString(key, value??"");
      });
    }
    if (type == allPresistent || type == urlPresistent) {
      if (!urlPersistent.containsKey(baseUrl)) {
        urlPersistent[baseUrl] = Map<String, String?>();
      }
      var keyMap = urlPersistent[baseUrl]!;
      keyMap.addAll(map);
      keyMap.forEach((key, value) {
        _store(baseUrl, urlPresistent).encodeString(key, value??"");
      });
    }
  }

  static Map<String, String?>? getPersistent(String baseUrl, {int type = allPresistent}) {
    Map<String, String?>? map;
    if (type == allPresistent || type == headerPresistent) {
      Map<String, String?>? headerMap;
      if (headerPersistent.containsKey(baseUrl)) {
        headerMap = headerPersistent[baseUrl];
      } else {
        headerMap = null;
      }
      if (headerMap != null) {
        if (map == null) {
          map = Map();
        }
        map.addAll(headerMap);
      }
    }
    if (type == allPresistent || type == urlPresistent) {
      Map<String, String?>? urlMap;
      if (urlPersistent.containsKey(baseUrl)) {
        urlMap = urlPersistent[baseUrl];
      } else {
        urlMap = null;
      }

      if (urlMap != null) {
        if (map == null) {
          map = Map();
        }
        map.addAll(urlMap);
      }
    }
    return map;
  }

  static Map<String, String?> _all(String baseurl, int type) {
    var mmkv= _store(baseurl, type);
    var keys = mmkv.allKeys;
    var map = Map<String, String?>();
    keys.forEach((element) {
      var value = mmkv.decodeString(element);
      map[element] = value;
    });
    return map;
  }

  static void flushPersistent(String baseurl, {int type = allPresistent}) {
    if (type == allPresistent || type == headerPresistent) {
      var map = _all(baseurl, headerPresistent);
      headerPersistent[baseurl]?.clear();

      if (!headerPersistent.containsKey(baseurl)) {
        headerPersistent[baseurl] = Map<String, String?>();
      }
      var keyMap = headerPersistent[baseurl]!;
      keyMap.addAll(map);
    }
    if (type == allPresistent || type == urlPresistent) {
      var map = _all(baseurl, urlPresistent);
      urlPersistent[baseurl]?.clear();
      if (!urlPersistent.containsKey(baseurl)) {
        urlPersistent[baseurl] = Map<String, String?>();
      }
      var keyMap = urlPersistent[baseurl]!;
      keyMap.addAll(map);
    }

  }

  static void removeAllPersistent(String baseurl, {int type = allPresistent}) {
    if (type == allPresistent || type == headerPresistent) {
      headerPersistent[baseurl]?.clear();
      _store(baseurl, headerPresistent).clearAll();
    }
    if (type == allPresistent || type == urlPresistent) {
      urlPersistent[baseurl]?.clear();
      _store(baseurl, urlPresistent).clearAll();
    }
  }
}



class PresistentInterceptor extends Interceptor {

  @override
  void onRequest(RequestOptions options, RequestInterceptorHandler handler) {
    var urlPersitents = HttpPersistent.getPersistent(options.baseUrl,type: HttpPersistent.urlPresistent);
    var headerPersitents = HttpPersistent.getPersistent(options.baseUrl,
        type: HttpPersistent.headerPresistent);
    headerPersitents?.forEach((key, value) {
      options.headers[key] = value;
    });

    urlPersitents?.forEach((key, value) {
      options.queryParameters[key] = value;
    });
    super.onRequest(options, handler);
  }

}

1、登陸后，調(diào)用存儲(chǔ)
HttpPersistent.setPersistent("http://www.baidu.com","token","123",HttpPersistent.headerPresistent)
2、退出登陸后，調(diào)用移除
HttpPersistent.removeAllPersistent("http://www.baidu.com",,type: HttpPersistent.headerPresistent);
3、應(yīng)用啟動(dòng)后刷新緩存
HttpPersistent.flushPersistent("http://www.baidu.com",
type: HttpPersistent.headerPresistent);

五、大功告成

如上就構(gòu)建出一套可靠性高，維護(hù)性高的網(wǎng)絡(luò)持久化框架

更多flutter教程請(qǐng)關(guān)注我的IMGeek：https://www.imgeek.org/people/33692

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