Windows Azure Mobiles Services实现client的登录注冊

黄智勇

　　下文仅仅是简单实现，client以Android端的实现为例：
　　用户表Account：
　　

package com.microsoft.ecodrive.model;
public class Account {
@com.google.gson.annotations.SerializedName("id")
public String id;
@com.google.gson.annotations.SerializedName("username")
public String username;
@com.google.gson.annotations.SerializedName("password")
public String password;
@Override
public boolean equals(Object o) {
return o instanceof Account && ((Account) o).id == id;
}
}


一、登录　　1、服务端新建api:login，将其script替换例如以下：
　　

exports.post = function(request, response) {
// Use "request.service" to access features of your mobile service, e.g.:
//   var tables = request.service.tables;
//   var push = request.service.push;
response.send(statusCodes.OK, { message : "post" });
};
exports.get = function(request, response) {
var myTable = request.service.tables.getTable('Account');
myTable.where({
username: request.param('username'),
password:request.param('password')
}).read({
success: checkPermissions
});
function checkPermissions(results) {
if (results.length <= 0) {
response.send(statusCodes.BAD_REQUEST, 'No such user.');
} else {
response.send(statusCodes.OK, { message : 'sucess.' });
}
}
};
　　2、client登录代码例如以下：
　　

private void login(final String name,final String pwd) {
List<Pair<String, String>> parameters = new ArrayList<Pair<String, String>>();
parameters.add(new Pair<String, String>("username", name));
parameters.add(new Pair<String, String>("password", pwd));
mClient.invokeApi("login","get", parameters, APIResult.class, new ApiOperationCallback<APIResult>() {
@Override
public void onCompleted(APIResult result, Exception exception, ServiceFilterResponse response) {
int code = response.getStatus().getStatusCode();
Log.i(TAG, "StatusCode:"+code);
if (exception == null) {
showToast("Login sucess!");
} else if (code==400) {
showToast("Username or password is wrong, please try again.");
}else{
showToast(exception.getMessage());
}
}
});
}注：因为是从项目中摘出来的。一些方法须要自己去初始化。　　二、注冊
　　方法一：api方式
　　1、服务端新建api：register。将其script替换例如以下：
　　

exports.post = function(request, response) {
var myTable = request.service.tables.getTable('Account');
myTable.where({
username: request.param('username')
}).read({
success: checkPermissions
});
function checkPermissions(results) {
if (results.length <= 0) {
var toInsert ={username:request.param('username'),password:request.param('password')};
myTable.insert(toInsert, {
success: function () {
response.send(statusCodes.OK, { message : 'Register sucess!'});
}
});
} else {
console.log('User %s Already exist.', request.param('username'));
response.send(statusCodes.BAD_REQUEST, 'Already exist.');
}
}
};
exports.get = function(request, response) {
response.send(statusCodes.OK, { message : 'Hello World!' });
};
　　2、client代码例如以下：


　　

//use api
private void register1(final String name,final String pwd) {
List<Pair<String, String>> parameters = new ArrayList<Pair<String, String>>();
parameters.add(new Pair<String, String>("username", name));
parameters.add(new Pair<String, String>("password", pwd));
mClient.invokeApi("register","post", parameters, APIResult.class, new ApiOperationCallback<APIResult>() {
@Override
public void onCompleted(APIResult result, Exception exception, ServiceFilterResponse response) {
int code = response.getStatus().getStatusCode();
Log.i(TAG, "StatusCode:"+code);
if (exception == null) {
//Sucess
showToast(result.message);
} else if (code==400) {
showToast(response.getContent());
}else{
showToast(exception.getMessage());
}
}
});
}

方法二：改动Accout表的insert的script。　　


　　1、替换Accout表的insert的script例如以下：
　　

function insert(item, user, request) {
var permissionsTable = tables.getTable('Account');
permissionsTable.where({
username: item.username
}).read({
success: checkPermissions
});
function checkPermissions(results) {
if (results.length <= 0) {
request.execute();
} else {
console.log('User %s Already exist.', item.username);
request.respond(statusCodes.BAD_REQUEST, 'User already exist');
}
}
}
　　2、client代码例如以下：


　　

//use insert
private void register(final String name,final String pwd) {
Account account = new Account();
account.username = name;
account.password = pwd;
mAccountTable.insert(account,new TableOperationCallback<Account>() {
@Override
public void onCompleted(Account result, Exception exception,
ServiceFilterResponse response) {
int code = response.getStatus().getStatusCode();
Log.i(TAG, "StatusCode:"+code);
if (exception == null) {
//Sucess
showToast("Register sucess!");
} else if (code==400) {
showToast(response.getContent().replace("\"", ""));
}else{
showToast(exception.getMessage());
}
}
});
}
　　另，APIResult类例如以下：

package com.microsoft.ecodrive.model;
import com.google.gson.annotations.SerializedName;
public class APIResult {
@SerializedName("count")
public int mCount;
public int getCount() {
return mCount;
}
public String message;
}