大约有 23,000 项符合查询结果（耗时：0.0379秒） [XML]
What is the difference between OpenID and SAML?
...rther expands this to make it possible to obtain the identity without this extra step involving the call from the application to the identity provider. The idea is based on the fact that OpenID Connect providers in fact issue two tokens, the access_token, the very same one OAuth2.0 issues and the ne...
What is the largest TCP/IP network port number allowable for IPv4?
...
@JessieArr Most IP stacks use a tuple of Source IP address, Source port, Destination IP address and Destination port as a unique identifier for connections. This means that a server can have many many more active connections than there are a...
Linux command to print directory structure in the form of a tree
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Beware of the newline character at the end of the first line if copying this directly
– Rahul
Aug 5 '16 at 16:46
2
...
What's the difference between streams and datagrams in network programming?
...ets
stream (TCP, order and delivery guaranteed,no duplication,no length or char boundaries for data,connection-oriented,reliable, concurrency)
datagram(UDP,packet-based, connectionless, datagram size limit, data can be lost or duplicated, order not guaranteed,not reliable)
raw (direct access to lowe...
java.net.UnknownHostException: Invalid hostname for server: local
...ther. Everything was right.
The Solution
Not calling trim() for the host string which contained whitespace. In writing a proxy server the host was obtained from HTTP headers with the use of split(":") by semicolons for the HOST header. This left whitespace, and causes the UnknownHostException as a...
Using ping in c#
...
using System.Net.NetworkInformation;
public static bool PingHost(string nameOrAddress)
{
bool pingable = false;
Ping pinger = null;
try
{
pinger = new Ping();
PingReply reply = pinger.Send(nameOrAddress);
pingable = reply.Status == IPStatus.Success;...
Lost connection to MySQL server at 'reading initial communication packet', system error: 0
...ggests that it might be because the MySQL server is bound to the loop-back IP (127.0.0.1 / localhost) which effectively cuts you off from connecting from "outside".
If this is the case, you need to upload the script to the webserver (which is probably also running the MySQL server) and keep your se...
Is gcc's __attribute__((packed)) / #pragma pack unsafe?
...7
p1 = ffbff31c
Bus error
In both cases, the program is compiled with no extra options, just gcc packed.c -o packed.
(A program that uses a single struct rather than array doesn't reliably exhibit the problem, since the compiler can allocate the struct on an odd address so the x member is properl...
Regexp Java for password validation
...[@#$%^&+=])(?=\S+$).{8,}$
Explanation:
^ # start-of-string
(?=.*[0-9]) # a digit must occur at least once
(?=.*[a-z]) # a lower case letter must occur at least once
(?=.*[A-Z]) # an upper case letter must occur at least once
(?=.*[@#$%^&+=]) # a special ...
How Can I Download a File from EC2 [closed]
...
Use scp:
scp -i ec2key.pem username@ec2ip:/path/to/file .
where:
ec2key.pem is your PEM key
username is the username you log in with
ec2ip is the IP or DNS alias of the instance
/path/to/file is the location where the file is stored
This will copy the file i...