iOS：根据日志去定位网络请求发生的错误是由于服务端造成的，还是客户端造成的？
一、介绍
在项目开发中，服务端和客户端的协作尤为重要，而连接它们的最重要的环节之一就是网络请求，对于服务端而言，如果这个环节出现了错误，那么安全性就无从谈起，同时对于客户端而言，如果这个模块出现了错误，那么后续的开发就无法继续进行下去。诚然，当网络请求真的出现了问题，快速定位问题的源头就显得迫在眉睫了。本博文提供三种定位问题源头的方法，判断是服务端的原因，还是客户端的原因，避免大家找问题浪费大量的无用功。
二、ATS
一个配置网络请求方式的配置字段，NSAppTranportSecurity下的 Allow Arbitrary Loads，设置为NO，默认所有的网络请求都必须走HTTPS(SSL/TLS)协议；如果设置为YES，即是全局设置，既可以走HTTP协议，也可以走HTPPS(SSL/TLS)协议。
三、问题定位方式(查看网络请求的详细log日志)
第一种方式：配置CFNETWORK_DIAGNOSTICS=1
步骤：打开xcode的项目，找到edit scheme中的run，然后选择Arguments,给Envaironment Variables添加CFNETWORK_DIAGNOSTICS=1，最后运行程序发送网络请求即可。此时在consolelog控制器会给出网络请求详细的log日志文件路径，根据路径找到就OK了。配置如图：
点击按钮测试发送请求，我以我公司的官方来测试（本公司服务端已做了https配置）
// ViewController.m
// RequestDemo
// Created by 夏远全 on 16/12/25.
// Copyright © 2016年 广州市东德网络科技有限公司. All rights reserved.
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController - (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor]; //发送请求
UIButton *requestBtn = [[UIButton alloc] initWithFrame:CGRectMake(, , , )];
requestBtn.backgroundColor = [UIColor redColor];
[requestBtn setTitle:@"requestSend" forState:UIControlStateNormal];
[requestBtn setTitleColor:[UIColor greenColor] forState:UIControlStateNormal];
[requestBtn addTarget:self action:@selector(requestSend) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:requestBtn];
} //发送请求
-(void)requestSend{ NSURL *URL = [NSURL URLWithString:@"https://www.biaojiepay.com"];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue currentQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {
NSLog(@"complete");
}];
}
@end
打印的显示log日志文件路径如下：
-- ::26.910 RequestDemo[:] CFNetwork diagnostics log file created at: /Users/FanLei/Library/Developer/CoreSimulator/Devices/C4192179-66A1-40C6-B09B-095C1248F68E/data/Containers/Data/Application/FE58F06E-B7BC-428E-82AE-0ED0A567ACD1/Library/Logs/CrashReporter/CFNetwork_com.biaojiepay.RequestDemo_966.nwlrb.log
-- ::27.049 RequestDemo[:] complete
此时按照提供的路径去访问该文件查看，里面记录了网络请求的详细日志信息
Dec :: RequestDemo[] <Notice>: CFNetwork Diagnostics [:] ::26.910 {
LoaderWhatToDo
Request: <CFURL 0x7ff8ea816690 [0x10420ba40]>{string = https://www.biaojiepay.com/, encoding = 134217984, base = (null)}
CachePolicy:
WhatToDo: originload
CreateToNow: .02034s
} [:]
Dec :: RequestDemo[] <Notice>: CFNetwork Diagnostics [:] ::26.912 {
AddCookies Continue: request GET https://www.biaojiepay.com/ HTTP/1.1
HTTPProtocol: Task: e8ca1fd0
} [:]
Dec :: RequestDemo[] <Notice>: CFNetwork Diagnostics [:] ::26.912 {
DiskCookieStorage Construction: Binary{ Disk Cookies: { /Users/FanLei/Library/Developer/CoreSimulator/Devices/C4192179-66A1-40C6-B09B-095C1248F68E/data/Containers/Data/Application/FE58F06E-B7BC-428E-82AE-0ED0A567ACD1/Library/Cookies/com.biaojiepay.RequestDemo.binarycookies, < cookies in domains> clean not writing } }
Accessing: <CFURL 0x7ff8e8ead9f0 [0x10420ba40]>{string = file:///Users/FanLei/Library/Developer/CoreSimulator/Devices/C4192179-66A1-40C6-B09B-095C1248F68E/data/Containers/Data/Application/FE58F06E-B7BC-428E-82AE-0ED0A567ACD1/Library/Cookies/com.biaojiepay.RequestDemo.binarycookies, encoding = 134217984, base = (null)}
Path: /Users/FanLei/Library/Developer/CoreSimulator/Devices/C4192179-66A1-40C6-B09B-095C1248F68E/data/Containers/Data/Application/FE58F06E-B7BC-428E-82AE-0ED0A567ACD1/Library/Cookies/com.biaojiepay.RequestDemo.binarycookies
Read from disk: < cookies in domains>
Dirty: NO
Writing: NO
Policy:
} [:]
Dec :: RequestDemo[] <Notice>: CFNetwork Diagnostics [:] ::26.913 {
DiskCookieStorage Journaling On: Binary{ Disk Cookies: { /Users/FanLei/Library/Developer/CoreSimulator/Devices/C4192179-66A1-40C6-B09B-095C1248F68E/data/Containers/Data/Application/FE58F06E-B7BC-428E-82AE-0ED0A567ACD1/Library/Cookies/com.biaojiepay.RequestDemo.binarycookies, < cookies in domains> clean not writing } }
File: <CFURL 0x7ff8e8caa490 [0x10420ba40]>{string = file:///Users/FanLei/Library/Developer/CoreSimulator/Devices/C4192179-66A1-40C6-B09B-095C1248F68E/data/Containers/Data/Application/FE58F06E-B7BC-428E-82AE-0ED0A567ACD1/Library/Cookies/com.biaojiepay.RequestDemo.binarycookies, encoding = 134217984, base = (null)}
} [:]
Dec :: RequestDemo[] <Notice>: CFNetwork Diagnostics [:] ::26.913 {
Protocol Enqueue: request GET https://www.biaojiepay.com/ HTTP/1.1
Request: <CFURLRequest 0x7ff8ea816700 [0x10420ba40]> {url = https://www.biaojiepay.com/, cs = 0x0}
Message: GET https://www.biaojiepay.com/ HTTP/1.1
} [:]
Dec :: RequestDemo[] <Notice>: CFNetwork Diagnostics [:] ::27.001 {
Peer certificate
Subject Sum: www.biaojiepay.com
Summary: Symantec Basic DV SSL CA - G1
} [:]
Dec :: RequestDemo[] <Notice>: CFNetwork Diagnostics [:] ::27.008 {
Authentication Challenge
Loader: <CFURLRequest 0x7ff8e8c9ba60 [0x10420ba40]> {url = https://www.biaojiepay.com, cs = 0x0}
Challenge: challenge space https://www.biaojiepay.com:443/, ServerTrustEvaluationRequested (Hash c4e968442f77296)
} [:]
Dec :: RequestDemo[] <Notice>: CFNetwork Diagnostics [:] ::27.008 {
Use Credential
Loader: <CFURLRequest 0x7ff8e8c9ba60 [0x10420ba40]> {url = https://www.biaojiepay.com, cs = 0x0}
Credential: null
} [:]
Dec :: RequestDemo[] <Notice>: CFNetwork Diagnostics [:] ::27.009 {
touchConnection
Loader: <CFURLRequest 0x7ff8e8c9ba60 [0x10420ba40]> {url = https://www.biaojiepay.com, cs = 0x0}
Timeout Interval: 60.000 seconds
} [:]
Dec :: RequestDemo[] <Notice>: CFNetwork Diagnostics [:] ::27.046 {
Protocol Received: request GET https://www.biaojiepay.com/ HTTP/1.1
Response: HTTP/1.1 OK
} [:]
Dec :: RequestDemo[] <Notice>: CFNetwork Diagnostics [:] ::27.046 {
touchConnection
Loader: <CFURLRequest 0x7ff8e8c9ba60 [0x10420ba40]> {url = https://www.biaojiepay.com, cs = 0x0}
Timeout Interval: 60.000 seconds
} [:]
Dec :: RequestDemo[] <Notice>: CFNetwork Diagnostics [:] ::27.046 {
destroyReadStream: request GET https://www.biaojiepay.com/ HTTP/1.1
Request: <CFURLRequest 0x7ff8ea816700 [0x10420ba40]> {url = https://www.biaojiepay.com/, cs = 0x0}
sent: <CFNumber 0xb000000000000c53 [0x10420ba40]>{value = +, type = kCFNumberSInt64Type}
received: <CFNumber 0xb00000000000d213 [0x10420ba40]>{value = +, type = kCFNumberSInt64Type}
cell sent: <CFNumber 0xb000000000000003 [0x10420ba40]>{value = +, type = kCFNumberSInt64Type}
cell received: <CFNumber 0xb000000000000003 [0x10420ba40]>{value = +, type = kCFNumberSInt64Type}
} [:]
Dec :: RequestDemo[] <Notice>: CFNetwork Diagnostics [:] ::27.047 {
touchConnection
Loader: <CFURLRequest 0x7ff8e8c9ba60 [0x10420ba40]> {url = https://www.biaojiepay.com, cs = 0x0}
Timeout Interval: 60.000 seconds
} [:]
Dec :: RequestDemo[] <Notice>: CFNetwork Diagnostics [:] ::27.047 {
Response Complete
Request: <CFURLRequest 0x7ff8ea816700 [0x10420ba40]> {url = https://www.biaojiepay.com/, cs = 0x0}
} [:]
Dec :: RequestDemo[] <Notice>: CFNetwork Diagnostics [:] ::27.047 {
Did Finish
Loader: <CFURLRequest 0x7ff8e8c9ba60 [0x10420ba40]> {url = https://www.biaojiepay.com, cs = 0x0}
init to origin load: .021334s
total time: .15739s
total bytes:
} [:]
Dec :: RequestDemo[] <Notice>: CFNetwork Diagnostics [:] ::27.048 {
touchConnection
Loader: <CFURLRequest 0x7ff8e8c9ba60 [0x10420ba40]> {url = https://www.biaojiepay.com, cs = 0x0}
Timeout Interval: 60.000 seconds
} [:]
Dec :: RequestDemo[] <Notice>: CFNetwork Diagnostics [:] ::27.048 {
~HTTPProtocol: nullptr request
Request: null
sent:
received:
cell sent:
cell received:
} [:]
Dec :: RequestDemo[] <Notice>: CFNetwork Diagnostics [:] ::28.914 {
DiskCookieStorage Sync Request
Forced: no
isDirty: no
isWriting: no
File: <CFURL 0x7ff8e8eb0cb0 [0x10420ba40]>{string = file:///Users/FanLei/Library/Developer/CoreSimulator/Devices/C4192179-66A1-40C6-B09B-095C1248F68E/data/Containers/Data/Application/FE58F06E-B7BC-428E-82AE-0ED0A567ACD1/Library/Cookies/com.biaojiepay.RequestDemo.binarycookies, encoding = 134217984, base = (null)}
Journal: yes
Mutations:
} [:]
第二种方式：采用mac自带的命令行查看网络请求日志，即/usr/bin/nscurl --ats-diagnostics --verbose https://www.biaojiepay.com(这个是带上的测试网址)
使用该命令行发送请求测试，我以我公司的官方来测试（本公司服务端已做了https配置，所有验证都会通过Pass）
终端运行结果如下：可以看到全都支持，所以pass通过
Last login: Sun Dec :: on ttys003
FanLeideMacBook-Pro:~ FanLei$ /usr/bin/nscurl --ats-diagnostics --verbose https://www.biaojiepay.com
Starting ATS Diagnostics Configuring ATS Info.plist keys and displaying the result of HTTPS loads to https://www.biaojiepay.com.
A test will "PASS" if URLSession:task:didCompleteWithError: returns a nil error.
================================================================================ Default ATS Secure Connection
---
ATS Default Connection
ATS Dictionary:
{
}
Result : PASS
--- ================================================================================ Allowing Arbitrary Loads ---
Allow All Loads
ATS Dictionary:
{
NSAllowsArbitraryLoads = true;
}
Result : PASS
--- ================================================================================ Configuring TLS exceptions for www.biaojiepay.com ---
TLSv1.
ATS Dictionary:
{
NSExceptionDomains = {
"www.biaojiepay.com" = {
NSExceptionMinimumTLSVersion = "TLSv1.2";
};
};
}
Result : PASS
--- ---
TLSv1.
ATS Dictionary:
{
NSExceptionDomains = {
"www.biaojiepay.com" = {
NSExceptionMinimumTLSVersion = "TLSv1.1";
};
};
}
Result : PASS
--- ---
TLSv1.
ATS Dictionary:
{
NSExceptionDomains = {
"www.biaojiepay.com" = {
NSExceptionMinimumTLSVersion = "TLSv1.0";
};
};
}
Result : PASS
--- ================================================================================ Configuring PFS exceptions for www.biaojiepay.com ---
Disabling Perfect Forward Secrecy
ATS Dictionary:
{
NSExceptionDomains = {
"www.biaojiepay.com" = {
NSExceptionRequiresForwardSecrecy = false;
};
};
}
Result : PASS
--- ================================================================================ Configuring PFS exceptions and allowing insecure HTTP for www.biaojiepay.com ---
Disabling Perfect Forward Secrecy and Allowing Insecure HTTP
ATS Dictionary:
{
NSExceptionDomains = {
"www.biaojiepay.com" = {
NSExceptionAllowsInsecureHTTPLoads = true;
NSExceptionRequiresForwardSecrecy = false;
};
};
}
Result : PASS
--- ================================================================================ Configuring TLS exceptions with PFS disabled for www.biaojiepay.com ---
TLSv1. with PFS disabled
ATS Dictionary:
{
NSExceptionDomains = {
"www.biaojiepay.com" = {
NSExceptionMinimumTLSVersion = "TLSv1.2";
NSExceptionRequiresForwardSecrecy = false;
};
};
}
Result : PASS
--- ---
TLSv1. with PFS disabled
ATS Dictionary:
{
NSExceptionDomains = {
"www.biaojiepay.com" = {
NSExceptionMinimumTLSVersion = "TLSv1.1";
NSExceptionRequiresForwardSecrecy = false;
};
};
}
Result : PASS
--- ---
TLSv1. with PFS disabled
ATS Dictionary:
{
NSExceptionDomains = {
"www.biaojiepay.com" = {
NSExceptionMinimumTLSVersion = "TLSv1.0";
NSExceptionRequiresForwardSecrecy = false;
};
};
}
Result : PASS
--- ================================================================================ Configuring TLS exceptions with PFS disabled and insecure HTTP allowed for www.biaojiepay.com ---
TLSv1. with PFS disabled and insecure HTTP allowed
ATS Dictionary:
{
NSExceptionDomains = {
"www.biaojiepay.com" = {
NSExceptionAllowsInsecureHTTPLoads = true;
NSExceptionMinimumTLSVersion = "TLSv1.2";
NSExceptionRequiresForwardSecrecy = false;
};
};
}
Result : PASS
--- ---
TLSv1. with PFS disabled and insecure HTTP allowed
ATS Dictionary:
{
NSExceptionDomains = {
"www.biaojiepay.com" = {
NSExceptionAllowsInsecureHTTPLoads = true;
NSExceptionMinimumTLSVersion = "TLSv1.1";
NSExceptionRequiresForwardSecrecy = false;
};
};
}
Result : PASS
--- ---
TLSv1. with PFS disabled and insecure HTTP allowed
ATS Dictionary:
{
NSExceptionDomains = {
"www.biaojiepay.com" = {
NSExceptionAllowsInsecureHTTPLoads = true;
NSExceptionMinimumTLSVersion = "TLSv1.0";
NSExceptionRequiresForwardSecrecy = false;
};
};
}
Result : PASS
--- ================================================================================ FanLeideMacBook-Pro:~ FanLei$
第三种方式：如果是服务端的问题，可以采用TLSTool来帮助你定位。（坑：TSLTool不能再Xcode8下编译）
先下载工具编译后，再在终端测试示例：我以我公司的官方来测试，端口443（本公司服务端已做了https配置，所有验证都会通过Pass）
./TLSTool s_client -connect www.biaojiepay.com: GET https://www.biaojiepay.com HTTP/1.1 Host: www.biajiepay.com
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