维基百科 eD2k链接的大致式形如: ed2k://|类型|其他信息|/ 使用“|”分隔开各个区域。 注释: ed2k://:协议处理方法。指明该协议是eD2k协议。 类型:链接类型。有三种:file(文件)、server(服务器)、serverlist(服务器列表)。 其他信息:具体的其他
维基百科
eD2k链接的大致格式形如:
ed2k://|||/
使用“|”分隔开各个区域。
注释:
ed2k://:协议处理方法。指明该协议是eD2k协议。
:链接类型。有三种:file(文件)、server(服务器)、serverlist(服务器列表)。
:具体的其他信息。
文件链接
典型的、基础的eD2k文件链接只包含必要的三样信息:文件名、文件大小、文件的eD2k Hash。形如:
ed2k://|file||||/
以下是大小为2868871字节(约2.7MB)的官方eMule v0.49c zip压缩包的eD2k链接的例子:
ed2k://|file|eMule0.49c.zip|2868871|0F88EEFA9D8AD3F43DABAC9982D2450C|/
eD2k链接也可以包含一个或多个来源的IP地址与端口,形如:
ed2k://|file||||/|sources,
例如:
ed2k://|file|eMule0.49c.zip|2868871|0F88EEFA9D8AD3F43DABAC9982D2450C|/|sources,202.89.123.6:4662|/
在eMule中,eD2k链接也可以包含根Hash(Root Hash)值。根Hash提供了一个可靠的值用于AICH(高级智能损坏处理),在传输的文件有损坏或错误时进行纠正恢复。包含根Hash的eD2k链接形如:
ed2k://|file||||h=|/
例如:
ed2k://|file|eMule0.49c.zip|2868871|0F88EEFA9D8AD3F43DABAC9982D2450C|h=SQ7LUTYUSMDBP2TVE2M7T6VUBLU324KF|/
完整的Hashset可以确保文件的正确,也可帮助发布新的与罕见的文件。包含Hashset的eD2k链接形如:
ed2k://|file||||p=
带主机的eD2k链接形如:
ed2k://|file||||/|sources,|/
eMule也可兼容带HTTP来源的eD2k链接,形如:
ed2k://|file||||s=|/
服务器链接
eDonkey服务器的eD2k链接和文件的eD2k链接类似,它可以指示一个eDonkey服务器地址,格式形如:
ed2k://|server|
例如:
ed2k://|server|207.44.222.51|4242|/
服务器列表链接
服务器列表链接,用于从一个固定的HTTP地址添加server.met服务器列表文件。格式形如:
ed2k://|serverlist|
Kad节点列表链接
Kad节点列表链接,用于从一个固定的HTTP地址添加nodes.dat Kad节点文件。格式形如:
ed2k://|nodeslist|
好友链接
好友链接,根据用户Hash来添加好友。格式形如:
ed2k://|friend|||/
官方eMule不支持eD2k好友链接添加好友功能,仅Xtreme及Xtreme的Mods(如ScarAngel、Mephisto等)、CN Mod等部分eMule Mods支持此功能。
eD2k Hash
eD2k Hash 算法是一种MD4算法的变体。其函数是一个MD4 Hash列表(MD4 Hash List)的MD4根Hash,但与MD4 Hash的结果不同:
文件数据被分区成多个9500KB的chunks块(9728000字节或大约9.28MB)和剩余的一个chunk。每个chunk都要计算128-bit MD4 校验和。如果文件长度正好是9500KB的整倍数,剩余的大小为0的chunk依然存在于Hash列表的末尾。将这些chunk的MD4校验和按顺序联合起来,并使用MD4计算Hash,可得到eD2k Hash。对于仅由一个chunk组成的文件(即文件大小小于9500KB),MD4和eD2k Hash是完全相同的。
这种方法可以直接将Hash列表与原eD2k Hash进行验证,而无需使用文件块来验证。

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MySQL is suitable for small and large enterprises. 1) Small businesses can use MySQL for basic data management, such as storing customer information. 2) Large enterprises can use MySQL to process massive data and complex business logic to optimize query performance and transaction processing.

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MySQL is not a programming language, but its query language SQL has the characteristics of a programming language: 1. SQL supports conditional judgment, loops and variable operations; 2. Through stored procedures, triggers and functions, users can perform complex logical operations in the database.

MySQL is an open source relational database management system, mainly used to store and retrieve data quickly and reliably. Its working principle includes client requests, query resolution, execution of queries and return results. Examples of usage include creating tables, inserting and querying data, and advanced features such as JOIN operations. Common errors involve SQL syntax, data types, and permissions, and optimization suggestions include the use of indexes, optimized queries, and partitioning of tables.

MySQL is an open source relational database management system suitable for data storage, management, query and security. 1. It supports a variety of operating systems and is widely used in Web applications and other fields. 2. Through the client-server architecture and different storage engines, MySQL processes data efficiently. 3. Basic usage includes creating databases and tables, inserting, querying and updating data. 4. Advanced usage involves complex queries and stored procedures. 5. Common errors can be debugged through the EXPLAIN statement. 6. Performance optimization includes the rational use of indexes and optimized query statements.

MySQL is chosen for its performance, reliability, ease of use, and community support. 1.MySQL provides efficient data storage and retrieval functions, supporting multiple data types and advanced query operations. 2. Adopt client-server architecture and multiple storage engines to support transaction and query optimization. 3. Easy to use, supports a variety of operating systems and programming languages. 4. Have strong community support and provide rich resources and solutions.

InnoDB's lock mechanisms include shared locks, exclusive locks, intention locks, record locks, gap locks and next key locks. 1. Shared lock allows transactions to read data without preventing other transactions from reading. 2. Exclusive lock prevents other transactions from reading and modifying data. 3. Intention lock optimizes lock efficiency. 4. Record lock lock index record. 5. Gap lock locks index recording gap. 6. The next key lock is a combination of record lock and gap lock to ensure data consistency.


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