CN102638577B - Method, equipment and system for collecting seed files - Google Patents
Method, equipment and system for collecting seed files Download PDFInfo
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- CN102638577B CN102638577B CN201210084450.4A CN201210084450A CN102638577B CN 102638577 B CN102638577 B CN 102638577B CN 201210084450 A CN201210084450 A CN 201210084450A CN 102638577 B CN102638577 B CN 102638577B
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Abstract
The invention discloses a method, equipment and system for collecting seed files, which are used for improving pertinence and instantaneity of seed file collecting. The method comprises the following steps: a collecting server obtains a magnetic link from a central server, wherein the magnetic link is generated after the central server receives a resource request sent by at least one client, and the magnetic link at least comprises a Hash value of a request resource and a Tracker server address carried by the resource request; and the collecting server determines an opposite terminal client for downloading the same source according to the Hash value contained in the magnetic link and obtains fragment information of the request resource from the opposite terminal client so as to generate the seed files.
Description
Technical field
The present invention relates to networking technology area, relate in particular to a kind of method, equipment and device that gathers seed file.
Background technology
At point to point network (peer to peer, P2P) in, carrying out method that seed file (BitTorrent is commonly called as BT) gathers has multiplely, and wherein topmost two kinds of methods gather seed file for the mode that adopts reptile programmed acquisition seed file and adopt packet to kidnap.Seed file claims again first original (or metafile), in seed file, preserve the information of shared file, as the file name of shared file, file size, abduction server (Tracker) address etc., generally take " .torrent " as suffix.
Reptile program is automatically to extract the program of network, be generally the important component part of search engine, first reptile program needs to filter and irrelevant the linking of theme according to certain web page analysis algorithm, remain with the link of use and put it into and wait for URL (URL(uniform resource locator)) queue capturing, then according to certain search strategy, from queue, select next step URL address that will capture webpage, repeat this process until reach certain condition.As can be seen here, reptile program is by unlimited access, to go to climb each website (RuBT forum etc.), to obtain seed file, this just requires a great deal of time, and real-time is lower.
And first reptile program will determine the URL of the website crawling, this just makes reptile program can not crawl the website of all generation seed files.Reptile program adopts the mode of unlimited access also larger to the harm of website, certain time interval strategy must be set, time delay captures, this will reduce the speed that seed file gathers, meanwhile, when crawling seed file from website, generally all need to crawl in this website 3-7 layer could be to finding seed file, this has further reduced again acquisition rate, has reduced real-time.
The mode that packet is kidnapped is mainly to send packet by kidnapping client, analyzes packet content, then gathers seed file according to analysis result.Which is had relatively high expectations to server, and need to carry out flow lead.As can be seen here, the mode specific aim that packet is kidnapped is poor, and within gathering and only limiting to kidnap the scope of packet, gathers being limited in scope of seed file, gathers real-time poor.
Summary of the invention
The invention provides a kind of method, equipment and system that gathers seed file, in order to improve the specific aim that gathers seed file, improve the real-time that gathers seed file.
The concrete technical scheme that the embodiment of the present invention provides is as follows:
A method that gathers seed file, comprising:
Acquisition server obtains magnetic force link from central server, described magnetic force is linked as after described central server receives the resource request that at least one client sends and generates, and described magnetic force link at least comprises the cryptographic Hash of request resource and the Tracker server address that described resource request is carried;
Acquisition server determines according to the described cryptographic Hash comprising in described magnetic force link the opposite end client of downloading same resource, and from described opposite end client, obtains the burst information of described request resource, generates seed file.
An acquisition server, comprising:
Acquiring unit, for obtain magnetic force link from central server, described magnetic force is linked as after described central server receives the resource request that at least one client sends and generates, and described magnetic force link at least comprises the cryptographic Hash of request resource and the Tracker server address that described resource request is carried;
Processing unit, determines for the described cryptographic Hash comprising according to described magnetic force link the opposite end client of downloading same resource, and from described opposite end client address, obtains the burst information of described request resource, generates seed file.
A system that gathers seed file, comprising:
At least one requesting client, for sending resource request, at least comprises cryptographic Hash and the Tracker server address of request resource in described resource request;
Central server, the described resource request sending for receiving described at least one requesting client, and generate magnetic force link according to the cryptographic Hash of the described request resource comprising in described resource request and described Tracker server address, in described magnetic force link, at least comprise cryptographic Hash and the corresponding Tracker server address of described request resource;
Acquisition server, for obtain described magnetic force link from described central server, according to the described cryptographic Hash comprising in described magnetic force link, determine the opposite end client of downloading same resource, and from described opposite end client, obtain the burst information of described request resource, generate seed file;
At least one opposite end client, is used to described acquisition server that described resource burst information is provided.
Based on technique scheme, in the embodiment of the present invention, central server generates magnetic force link after receiving the resource request that at least one client sends, in this magnetic force link, at least comprise the cryptographic Hash of request resource and the Tracker server address that resource request is carried, acquisition server is from central server obtains this magnetic force link, according to the cryptographic Hash comprising in this magnetic force link, determine the opposite end client of downloading same resource, and from this opposite end client, obtain the burst information of request resource, generate seed file, thereby make acquisition server can link according to the magnetic force of real-time generation the burst information of Gains resources, and generate seed file, improved the real-time of the seed file gathering, simultaneously, according to cryptographic Hash, determine the opposite end client of downloading same resource, improved the specific aim of the seed file gathering.
Accompanying drawing explanation
Fig. 1 is the system architecture schematic diagram that gathers seed file in the embodiment of the present invention;
Fig. 2 is the structural representation of acquisition server in the embodiment of the present invention;
Fig. 3 gathers the method flow diagram of seed file in the embodiment of the present invention;
Fig. 4 is the process schematic diagram of DHT web search in the embodiment of the present invention;
Fig. 5 is seed file source schematic diagram in the embodiment of the present invention.
Embodiment
In order to improve the specific aim that gathers seed file, and improve the real-time that gathers seed file, the embodiment of the present invention provides a kind of method, equipment and system that gathers seed file.
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is elaborated.
In the document distribution system based on BT agreement, on Web server, preserve seed file, download person uses web browser to download seed file from Web server, preserves all download persons' the network address and the port numbers of certain shared file of current download in Tracker server.Original document supplier provides complete shared file to download for other download persons, and original document supplier uses BT client to generate primordial seed file.Each download person is by operation BT client downloads shared file, and other the download person outside this download person is called this download person's opposite end client.The process of a shared file of client downloads is as follows: first client resolves the seed file of acquisition, obtain the information of shared file to be downloaded, this information comprises the address of Tracker server, client connects Tracker server according to this address, obtain all download persons' the network address and the port numbers of the shared file of current download, client is connected other download person's (being opposite end client) again with port numbers according to the network address obtaining afterwards, carry out shared file download, while client offers opposite end client by the partial sharing file of having downloaded and downloads.
As shown in Figure 1, in the embodiment of the present invention, the system that gathers seed file mainly comprises at least one requesting client 101, central server 102, acquisition server 103 and at least one opposite end client 104, wherein,
At least one requesting client 101, for sending resource request, at least comprises cryptographic Hash and the Tracker server address of request resource in this resource request;
Central server 102, the resource request sending for receiving at least one requesting client 101, and generate magnetic force link according to the cryptographic Hash of the request resource comprising in this resource request and Tracker server address, in this magnetic force link, at least comprise cryptographic Hash and the corresponding Tracker server address of request resource;
Acquisition server 103, for obtain magnetic force link from central server 102, determines according to the cryptographic Hash comprising in this magnetic force link the opposite end client of downloading same resource, and from this opposite end client, obtains the burst information of request resource, generates seed file;
At least one opposite end client 104, is used to acquisition server 103 that resource burst information is provided.
Wherein, in P2P system, central server (can be a Tracker server in practical application) is a Centroid, and the resource request that client sends can be drawn to central server by flow lead (DPI) equipment.
Wherein, magnetic force link be with " magnet:? " the character string of beginning, mainly can pass through the file of P2P system downloads in order to identification.Magnetic force link is to using the cryptographic Hash of file as the digital finger-print of pure file, according to cryptographic Hash identification file, and is not the identification files such as position by file or title.
Wherein, as shown in Figure 2, in the embodiment of the present invention, acquisition server 103 mainly comprises following processing unit:
Acquiring unit 201, for obtain magnetic force link from central server, this magnetic force is linked as after central server receives the resource request that at least one client sends and generates, and this magnetic force link at least comprises the cryptographic Hash of request resource and the Tracker server address that resource request is carried;
Processing unit 202, determines for the cryptographic Hash that link comprises according to magnetic force the opposite end client of downloading same resource, and from this opposite end client, obtains the burst information of request resource, generates seed file.
Particularly, processing unit 202 is specifically for carrying out web search and determine the opposite end client of downloading same resource according to the cryptographic Hash comprising in magnetic force link, from corresponding opposite end client, obtain the burst information of request resource, resolve the coded format of the burst information of determining this resource, and generate seed file by the burst information of request resource, its coded format and after adopting predetermined coded system to encode with corresponding each the Tracker server address of cryptographic Hash.
Preferably, processing unit 202 is specifically for carrying out web search based on distributed hashtable (DHT) network, when the opposite end client of determining search does not comprise the corresponding request resource of cryptographic Hash, obtain the opposite end client side list of preserving in this opposite end client, and continue search according to this opposite end client side list; When the opposite end client of determining search comprises the corresponding request resource of cryptographic Hash, from this opposite end client, obtain the burst information of request resource.
Preferably, acquiring unit 201 also obtains magnetic force link for interval to schedule from central server.
Based on said system framework, as shown in Figure 3, in the embodiment of the present invention, the detailed method flow process that gathers seed file is as follows:
Step 301: acquisition server obtains magnetic force link from central server, this magnetic force is linked as after central server receives the resource request that at least one client sends and generates, and this magnetic force link at least comprises the cryptographic Hash of request resource and the Tracker server address that resource request is carried.
Wherein, obtain magnetic force link from central server at acquisition server before, central server receives the resource request that at least one client sends, the cryptographic Hash and the corresponding Tracker server address that in this resource request, at least comprise request resource, central server is at cryptographic Hash and the Tracker server address of this request resource of local record, and according to the cryptographic Hash of the request resource comprising in resource request, from local record, obtain each Tracker server address corresponding with cryptographic Hash, central server generates magnetic force link based on this cryptographic Hash and each corresponding Tracker server address.
Step 302: acquisition server determines according to the cryptographic Hash comprising in magnetic force link the opposite end client of downloading same resource, and from this opposite end client, obtain the burst information of request resource, generate seed file.
Particularly, acquisition server starts magnetic force link, according to the cryptographic Hash comprising in magnetic force link, carry out web search and determine the opposite end client of downloading same resource, from this opposite end client, obtain the burst information of request resource, resolve the coded format of the burst information of determining this resource, and generate seed file after adopting predetermined coded system to encode the burst information of this request resource, its coded format and each Tracker server address.
For example, acquisition server carries out generating seed file after B coding to the burst information of the request resource of obtaining and each Tracker server address.
Particularly, acquisition server carries out web search based on distributed hashtable (DHT) network, when the opposite end client of determining search does not comprise the corresponding request resource of cryptographic Hash, obtain the opposite end client side list of preserving in this opposite end client, and continue search according to this opposite end client side list; When the opposite end client of determining search comprises the corresponding request resource of cryptographic Hash, from this opposite end client, obtain the burst information of request resource.In practical application, as long as can determine a client comprising with the corresponding request resource of cryptographic Hash, the process of the opposite end client that can stop search, according to actual setting, also can be set to determine to set number comprise the client with the corresponding request resource of cryptographic Hash time, the process of the opposite end client that stops search.Wherein, when acquisition server is searched for each opposite end client according to the cryptographic Hash of request resource, this opposite end client is resolved the cryptographic Hash that local each seed file comprising can obtain respective resources, the cryptographic Hash of the resource that the cryptographic Hash of request resource and opposite end client are comprised compares, and is defined as same resource when both are identical.
For example, as shown in Figure 4, acquisition server is by the adjacent client of DHT web search, judge and in adjacent client, whether preserve the corresponding request resource of cryptographic Hash, when defining at least one client and have this request resource, this at least one client is defined as to opposite end client, and process stops search; And when not there is not the client of preserving the corresponding request resource of cryptographic Hash, obtain that in adjacent client, preserve and the opposite end client side list same resource of its download, and continue search according to this list, until find the opposite end client of preserving request resource corresponding to cryptographic Hash, process stops search.
Preferably, acquisition server is downloaded magnetic force link from central server in interval to schedule.
In a concrete realization, the first client sends resource request, and this resource request comprises cryptographic Hash and the Tracker server address of request resource.Central server receives after this resource request, in local daily record, record the cryptographic Hash and the corresponding Tracker server address that in this resource request, carry, and carry out after log analysis, obtain all Tracker server address corresponding to the cryptographic Hash with the request resource of carrying in above-mentioned resource request that record in daily record, and generate the link of magnetic force, this magnetic force link comprises cryptographic Hash and corresponding all Tracker server address of resource, comprising the Tracker server address carrying in resource request.Preferably, central server carries out log analysis and generates after corresponding magnetic force link, this magnetic force link is saved in a file, and this document is saved to predetermined storage location, for acquisition server, from central server, download the file of this magnetic force link and obtain this magnetic force link.
Acquisition server according to predetermined time interval from central server, download magnetic force link, and start this magnetic force link task, now acquisition server is with the identity of the first client, based on DHT network, find the opposite end client (searching for according to the cryptographic Hash comprising in magnetic force link) of downloading same resource, and from the client of opposite end, obtain the file fragmentation information of resource corresponding to cryptographic Hash, and by the file fragmentation information of obtaining and the predetermined coded system of the employings such as Tracker server address of carrying in linking with magnetic force encode, after coding, be recorded in the seed file with torrent ending, analyze the coded system of the file fragmentation information of obtaining simultaneously, and be recorded in this seed file, so far just successfully generate a BT seed file.In the seed file generating, include original resource burst information and Tracker address list.
In the embodiment of the present invention, as shown in Figure 5, the information of the BT seed file generating is mainly derived from central server, acquisition server and opposite end client, central server receives and records after resource request, magnetic force link and the Tracker address list of the cryptographic Hash that generation comprises request resource, the magnetic force link search that acquisition server provides according to central server is determined the opposite end client of downloading same resource, burst information from this opposite end client Gains resources, file name etc., last by acquisition server to the resource burst information of obtaining, Tracker address list etc. is encoded and is generated BT seed file.
With a concrete application example, to gathering the process of seed file, be elaborated below.
The resource request that the first client sends is:
/ announce? info_hash=8%A11%B6%FC%82%3Ef%C8%BA%BAO%07%1DQ%9C%F3%D3%9 1%A9 & peer_id=-lt0C60-%AF%2Fo%5EX%F2%0A%9D%F87%A0S & key=240f3a8d & compact=1 & port=6999 & uploaded=0 & downloaded=0 & left=0, wherein, info_hash is the cryptographic Hash of the first client-requested resource, when sending this resource request, also carry Tracker server address.
Central server receives after the resource request of this first client transmission, this resource request is modified, in this resource request, increase corresponding Tracker server address, increase racker server domain name (from_domain) corresponding to this resource request and port numbers (from_port), be specifically expressed as:
/ announce? info_hash=8%A11%B6%FC%82%3Ef%C8%BA%BAO%07%1DQ%9C%F3%D3%9 1%A9 & peer_id=-lt0C60-%AF%2Fo%5EX%F2%0A%9D%F87%A0S & key=240f3a8d & compact=1 & port=6999 & uploaded=0 & downloaded=0 & left=0 & from_port=80 & from_domain=www.example.com, wherein, from_port is port numbers, from_domain is domain name, the Tracker server domain of request is called www.example.com, port numbers is 80.
Central server is recorded in amended resource request in local journal file, and carry out log analysis, obtain all Tracker server address corresponding with the cryptographic Hash of the first client-requested resource, i.e. domain name and port numbers, the link of generation magnetic force, is specifically expressed as:
magnet:xt＝urn:btih:{info_hash}&tr＝http://{from_domain}:{from_port}/annnouce。
In practical application, the request of corresponding same info_hash has a plurality of domain names and port numbers, because in practical application, a seed can be preserved Tracker address list, client during according to this seed Gains resources, is asked server corresponding to Tracker address one by one with the form of queue.Meanwhile, from each website acquisition seed or seed publisher, all can add a plurality of different Tracker addresses, the very possible source resource corresponding to same info_hash is in two or more seeds.Central server in P2P system can receive the Tracker address corresponding to client of the same resource of all requests, this just makes the Tracker number of addresses that records in the daily record of central server can surpass the Tracker number of addresses of a client-requested, now, when the corresponding a plurality of Tracker of same cryptographic Hash address, the form of the magnetic force link of generation is for being expressed as:
magnet:xt＝urn:btih:{info_hash}&tr.0＝http://{from_domain0}:{from_port0}/annnouce&tr.1＝http://{from_domain1}:{from_port1}/annnouce&tr.2＝http://{from_domain3}:{from_port3}/annnouce。
For example,
Magnet:? xt=urn:btih:11041a574c9e52412a204edd027264b733b63bc1 & tr.0=http: //www.example0.com/announce & tr.1=http: //www.example1.com/announce & tr.2=http: //www.example2.com/announce, wherein, corresponding three the Tracker addresses of same cryptographic Hash.
Central server by the magnetic force chained record generating in the middle of a file, and be saved to predetermined memory location, for example by magnetic force chained record in file " down.txt ", and text file is saved in a static catalog configuring, for acquisition server, download.
Acquisition server is from central server download file " down.txt ", read this document and start the task of the magnetic force link of recording in this document, the form that the link form of this task links with magnetic force is identical, the cryptographic Hash of resource and Tracker address list all can obtain from this link, in practical application, acquisition server cryptographic Hash is determined the opposite end client of downloading same resource, the burst information of Gains resources from this opposite end client, file name etc., and the burst information of resolving the resource of obtaining is determined coded format, according to concrete application, the publisher of Gains resources from the client of opposite end selectively, the information such as comment, and by resource burst information, the coded format of resource burst information, Tracker address list, file names etc. carry out being recorded in BT seed file after B coding.
Based on technique scheme, in the embodiment of the present invention, central server generates magnetic force link after receiving the resource request that at least one client sends, in this magnetic force link, at least comprise the cryptographic Hash of request resource and the Tracker server address that resource request is carried, acquisition server is from central server obtains this magnetic force link, according to the cryptographic Hash comprising in this magnetic force link, determine the opposite end client of downloading same resource, and from this opposite end client, obtain the burst information of request resource, generate seed file, thereby make acquisition server can link according to the magnetic force of real-time generation the burst information of Gains resources, and generate seed file, improved the real-time that gathers seed file, according to cryptographic Hash, determine the opposite end client of downloading same resource, improved the specific aim that gathers seed file.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (10)
1. a method that gathers seed file, is characterized in that, comprising:
Acquisition server obtains magnetic force link from central server, described magnetic force is linked as after described central server receives the resource request that at least one client sends and generates, and described magnetic force link at least comprises the cryptographic Hash of request resource and the Tracker server address that described resource request is carried;
Acquisition server carries out web search based on distributed hashtable DHT network, according to the described cryptographic Hash comprising in described magnetic force link, determine the opposite end client of downloading same resource, and from described opposite end client, obtain the burst information of described request resource, generate seed file.
2. the method for claim 1, is characterized in that, acquisition server comprises before obtaining magnetic force link from central server:
Described central server receives the resource request that at least one client sends, and at least comprises cryptographic Hash and the corresponding Tracker server address of request resource in described resource request;
Described central server is at cryptographic Hash and the described Tracker server address of local record described request resource, and according to the cryptographic Hash of the described request resource comprising in described resource request, from local record, obtain each Tracker server address corresponding to described cryptographic Hash;
Described central server generates magnetic force link based on described cryptographic Hash and corresponding described each Tracker server address.
3. method as claimed in claim 2, it is characterized in that, described acquisition server determines according to the described cryptographic Hash comprising in described magnetic force link the opposite end client of downloading same resource, and from described opposite end client, obtains the burst information of described request resource, generate seed file, comprising:
Acquisition server carries out web search and determines the opposite end client of downloading same resource according to the cryptographic Hash comprising in described magnetic force link, from described opposite end client, obtain the burst information of described request resource, resolve the coded format of the burst information of determining described resource, and generate seed file after adopting predetermined coded system to encode the burst information of described request resource, described coded format and described each Tracker server address.
4. method as claimed in claim 3, is characterized in that, according to the cryptographic Hash comprising in described magnetic force link, carries out web search and determines the opposite end client of downloading same resource, comprising:
Described acquisition server carries out web search based on distributed hashtable DHT network, when the opposite end client of determining search does not comprise the corresponding request resource of described cryptographic Hash, obtain the opposite end client side list of preserving in the client of described opposite end, and continue search according to described opposite end client side list;
When the opposite end client of determining search comprises the corresponding request resource of described cryptographic Hash, from the client of described opposite end, obtain the burst information of described request resource.
5. method as claimed in claim 1 or 2, is characterized in that, described acquisition server to schedule interval obtains magnetic force link from described central server.
6. an acquisition server, is characterized in that, comprising:
Acquiring unit, for obtain magnetic force link from central server, described magnetic force is linked as after described central server receives the resource request that at least one client sends and generates, and described magnetic force link at least comprises the cryptographic Hash of request resource and the Tracker server address that described resource request is carried;
Processing unit, for carrying out web search based on distributed hashtable DHT network, according to the described cryptographic Hash comprising in described magnetic force link, determine the opposite end client of downloading same resource, and from described opposite end client, obtain the burst information of described request resource, generate seed file.
7. acquisition server as claimed in claim 6, it is characterized in that, described processing unit is specifically for carrying out web search and determine the opposite end client of downloading same resource according to the cryptographic Hash comprising in described magnetic force link, from described opposite end client, obtain the burst information of described request resource, resolve the coded format of the burst information of determining described resource, and generate seed file by the burst information of described request resource, described coded format and after adopting predetermined coded system to encode with corresponding each the Tracker server address of described cryptographic Hash.
8. acquisition server as claimed in claim 7, it is characterized in that, described processing unit is specifically for carrying out web search based on distributed hashtable DHT network, when the opposite end client of determining search does not comprise the corresponding request resource of described cryptographic Hash, obtain the opposite end client side list of preserving in the client of described opposite end, and continue search according to described opposite end client side list; When the opposite end client of determining search comprises the corresponding request resource of described cryptographic Hash, from the client of described opposite end, obtain the burst information of described request resource.
9. acquisition server as claimed in claim 6, is characterized in that, described acquiring unit also obtains magnetic force link for interval to schedule from described central server.
10. a system that gathers seed file, is characterized in that, comprising:
At least one requesting client, for sending resource request, at least comprises cryptographic Hash and the Tracker server address of request resource in described resource request;
Central server, the described resource request sending for receiving described at least one requesting client, and generate magnetic force link according to the cryptographic Hash of the described request resource comprising in described resource request and described Tracker server address, in described magnetic force link, at least comprise cryptographic Hash and the corresponding Tracker server address of described request resource;
Acquisition server, for obtain described magnetic force link from described central server, based on distributed hashtable DHT network, carry out web search, according to the described cryptographic Hash comprising in described magnetic force link, determine the opposite end client of downloading same resource, and from described opposite end client, obtain the burst information of described request resource, generate seed file;
At least one opposite end client, is used to described acquisition server that described resource burst information is provided.
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| CN105025064B (en) * | 2014-04-30 | 2019-07-02 | 腾讯科技（深圳）有限公司 | Download the method, apparatus and system of file |
| CN105450703A (en) * | 2014-08-28 | 2016-03-30 | 杭州迪普科技有限公司 | Data caching method and data caching device |
| CN109716731A (en) * | 2016-05-31 | 2019-05-03 | 埃克申铁克电子公司 | For providing the system and method for functions reliably and efficiently data transmission |
| CN111934849B (en) * | 2019-05-13 | 2023-05-05 | 阿里巴巴集团控股有限公司 | Magnetic link-based downloading method, device, system and readable storage medium |
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| CN101282363A (en) * | 2008-05-30 | 2008-10-08 | 腾讯科技（深圳）有限公司 | Method and system for establishing seed and downloading files in equity coupling network |
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