IOS网络协议HTTP

1、网络层基础知识

1.1、HTTP

HTTP通过过程

• ④⑤ 是应用层通信，①②③⑥⑦⑧⑨是运输层通信
• ①②③是三次握手建立通信，⑥⑦是断开Client->Server的通信，⑧⑨是断开Server->Client的通信

HTTP报文格式

1.2、HTTPS

• SSL 是早期的安全通信协议，已被逐步淘汰
• TLS 是 SSL 的改进版，提供更高的安全性和性能

HTTP与HTTPS的区别

SSL通信建立过程

客户端验证服务端证书有两点内容：

1. 验证服务端证书的数字摘要 和 服务端证书解密之后的内容 是否一致
2. 验证证书链的根证书（一般保存在浏览器或操作系统中）是否在可信任证书列表中

2、代码示例

ViewController.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController


@end

ViewController.m

#import "ViewController.h"

@interface ViewController ()



//手机号输入框
@property(nonatomic, strong) UITextField *etPhone;
//搜索按钮
@property(nonatomic, strong) UIButton *btnSearch;
//结果展示
@property(nonatomic, strong) UITextView *tvResult;



@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor whiteColor];
    [self initUI];
}



-(void)initUI{
    
    //手机号输入框
    self.etPhone = [[UITextField alloc]init];
    self.etPhone.borderStyle = UITextBorderStyleRoundedRect;
    self.etPhone.placeholder = @"请输入手机号";
    self.etPhone.keyboardType = UIKeyboardTypeNumberPad;
    self.etPhone.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:self.etPhone];
    
    
    
    //搜索按钮
    self.btnSearch = [UIButton buttonWithType:UIButtonTypeSystem];
    self.btnSearch.backgroundColor = [UIColor redColor];
    [self.btnSearch setTitle:@"查询归属地" forState:UIControlStateNormal];
    self.btnSearch.titleLabel.font = [UIFont boldSystemFontOfSize:24];
    [self.btnSearch setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    self.btnSearch.translatesAutoresizingMaskIntoConstraints = NO;
    [self.btnSearch addTarget:self action:@selector(searchPhoneNumber) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:self.btnSearch];
    
    
    
    //结果展示
    self.tvResult = [[UITextView alloc]init];
    self.tvResult.backgroundColor = [UIColor whiteColor];
    self.tvResult.layer.borderColor = [UIColor grayColor].CGColor;
    self.tvResult.layer.borderWidth = 1.0;
    self.tvResult.layer.cornerRadius = 6.0;
    [self.tvResult setTextColor:[UIColor blackColor]];
    self.tvResult.scrollEnabled = YES;
    self.tvResult.font = [UIFont systemFontOfSize:24];
    self.tvResult.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:self.tvResult];
    
    
    
    //设置布局-约束布局
    [NSLayoutConstraint activateConstraints:@[
    
        //手机号输入框
        [self.etPhone.topAnchor constraintEqualToAnchor:self.view.safeAreaLayoutGuide.topAnchor constant:20],
        [self.etPhone.leadingAnchor constraintEqualToAnchor:self.view.leadingAnchor constant:20],
        [self.etPhone.trailingAnchor constraintEqualToAnchor:self.view.trailingAnchor constant:-20],
        [self.etPhone.heightAnchor constraintEqualToConstant:40],
        
        
        //搜索按钮
        [self.btnSearch.topAnchor constraintEqualToAnchor:self.etPhone.bottomAnchor constant:30],
        [self.btnSearch.leadingAnchor constraintEqualToAnchor:self.etPhone.leadingAnchor constant:20],
        [self.btnSearch.trailingAnchor constraintEqualToAnchor:self.etPhone.trailingAnchor constant:-20],
        [self.btnSearch.heightAnchor constraintEqualToConstant:40],
        
        
        //结果展示文本
        [self.tvResult.topAnchor constraintEqualToAnchor:self.btnSearch.bottomAnchor constant:30],
        [self.tvResult.leadingAnchor constraintEqualToAnchor:self.etPhone.leadingAnchor],
        [self.tvResult.trailingAnchor constraintEqualToAnchor:self.etPhone.trailingAnchor],
        [self.tvResult.bottomAnchor constraintEqualToAnchor:self.view.safeAreaLayoutGuide.bottomAnchor constant:-20]
    ]];
    
    
}



//搜索手机号
-(void)searchPhoneNumber{
    
    NSString *phoneNumber = self.etPhone.text;
    if (phoneNumber == nil || phoneNumber.length < 1) {
        self.tvResult.text = @"手机号不可为空";
        return;
    }
    
    
    NSString *urlStr = [NSString stringWithFormat:@"https://cx.shouji.360.cn/phonearea.php?number=%@", phoneNumber];
    NSURL *url = [NSURL URLWithString:urlStr];
    
    NSURLSessionDataTask *dataTask = [[NSURLSession sharedSession]dataTaskWithURL:url completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        
        
        if(error){
            //请求失败
            dispatch_async(dispatch_get_main_queue(), ^{
                self.tvResult.text = [NSString stringWithFormat:@"请求失败: %@", error.localizedDescription];
            });
            return;
        }
        
        
        NSError *jsonError;
        NSDictionary *responseDict = [NSJSONSerialization JSONObjectWithData:data options:0 error:&jsonError];
        if (jsonError) {
            //json解析异常
            dispatch_async(dispatch_get_main_queue(), ^{
                self.tvResult.text = [NSString stringWithFormat:@"参数解析失败：%@", jsonError.localizedDescription];
            });
            return;
        }
        
        
        
        NSDictionary *dataDict = responseDict[@"data"];
        if (dataDict) {
            NSString *provice = dataDict[@"province"]?:@"未知";
            NSString *city = dataDict[@"city"]?:@"未知";
            NSString *sp = dataDict[@"sp"]?:@"未知";
            NSString *result = [NSString stringWithFormat:@"归属地：%@  %@\n运营商：%@", provice, city, sp];
            dispatch_sync(dispatch_get_main_queue(), ^{
                self.tvResult.text = result;
            });
            
        }else{
            dispatch_sync(dispatch_get_main_queue(), ^{
                self.tvResult.text = @"未查询到结果";
            });
        }
        
    }];
    
    [dataTask resume];
}





@end