CN111143791A - HashMap-based downloaded file tracing method and system - Google Patents
HashMap-based downloaded file tracing method and system Download PDFInfo
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Abstract
The invention provides a downloaded file tracing method based on HashMap, which comprises the following steps: step S1, establishing a HashMap object of a hash table, and constructing three key value pairs in program operation, wherein the key value pairs are composed of keys and two variables of values, and the three key value pairs are respectively: the variables are temporarily linked: initial linking of variables, new temporary linking of variables: variable temporary link, variable filename: a new temporary link to a variable; step S2, when the page of the website is accessed, the initial link, the temporary link, the new temporary link and the file name are obtained and correspondingly stored in the variable initial link, the variable temporary link value, the variable new temporary link and the variable file name in the three key value pairs; storing the key-value pairs into a HashMap object; step S3, in the source tracing stage, designating a file to be traced, searching a HashMap object through the file name of the file to be traced, and finding an initial link corresponding to the file to be traced through the three key value pairs; the invention improves the efficiency of file tracing.
Description
Technical Field
The invention relates to the technical field of computer communication, in particular to a downloaded file tracing method and a downloaded file tracing system based on HashMap.
Background
At present, file tracing basically associates and records and stores a downloaded file source and a file itself based on a log form. And when the downloading source needs to be known, traversing and matching the file information and the log information to finally obtain the file source. The existing method completely depends on log files for obtaining sources, and if the log files are lost, the tracing of the sources of the files is undoubtedly failed; and the efficiency is extremely low by circularly traversing the log content to match the file characteristic information.
Disclosure of Invention
In order to overcome the problems, the invention aims to provide a method for tracing the source of the downloaded file based on the HashMap, which is based on HashMap storage, has fast storage and query time and improves the efficiency of tracing the source of the file.
The invention is realized by adopting the following scheme: a downloaded file tracing method based on HashMap comprises the following steps: step S1, establishing a HashMap object of a hash table, and constructing three key value pairs in program operation, wherein the key value pairs are composed of keys and two variables of values, and the three key value pairs are respectively: the variables are temporarily linked: initial linking of variables, new temporary linking of variables: variable temporary link, variable filename: a new temporary link to a variable;
step S2, when the page of the website is accessed, the initial link, the temporary link, the new temporary link and the file name are obtained and correspondingly stored in the variable initial link, the variable temporary link value, the variable new temporary link and the variable file name in the three key value pairs; storing the key-value pairs into a HashMap object;
step S3, in the source tracing stage, designating the file to be traced, searching for the HashMap object according to the file name of the file to be traced, and finding the initial link corresponding to the file to be traced according to the three key value pairs.
Further, the step S2 is further specifically: step S21, creating and initializing a HashMap empty object of the hash table;
step S22, during program operation, obtaining a temporary link on the page according to the initial link, and forming a variable temporary link: storing the key-value pair of the variable initial link into a HashMap object;
step S23, obtaining new temporary links by the temporary links, and searching layer by layer until there is no new temporary link and a plurality of variables are formed as new temporary links: the key-value pairs of the variables are temporarily linked, and the key-value pairs are stored in the HashMap object;
step S24, when the new temporary link is found to be a download link, the file can be downloaded, the filename of the download file is obtained, and a variable filename is formed: and (4) storing the key-value pair of the new temporary link of the variable into the HashMap object.
Further, the step S3 is further specifically: step S31, in the tracing stage, the file to be traced is designated, and the file name of the file to be traced is used as a key;
step S32, find the value corresponding to the key in the HashMap object, that is, from the variable file name: the key value pair of the variable new temporary link obtains the variable new temporary link,
step S33, using the value of the new temporary link of the variable as a key to the new temporary link of the variable: and searching a new value in the key value pair of the temporary variable link, and searching repeatedly until the initial link is found, so that the tracing is completed.
Further, the implementation manner of obtaining the new temporary link by the temporary link is as follows: after the temporary link is obtained, the hyperlink on the page of the temporary link is searched to be recorded as a new temporary link by clicking the temporary link, and the hyperlink comprises a clickable label, a picture and a dynamic frame.
The invention also provides a downloaded file traceability system based on the HashMap, which comprises a key value pair setting module, an acquisition module and a file traceability module;
the key value pair setting module is used for establishing a HashMap object of a hash table, and during program operation, three key value pairs are established, wherein each key value pair consists of a key and a value, and the three key value pairs are respectively as follows: the variables are temporarily linked: initial linking of variables, new temporary linking of variables: variable temporary link, variable filename: a new temporary link to a variable;
the acquisition module is used for acquiring an initial link, a temporary link, a new temporary link and a file name when a page of a website is accessed, and correspondingly storing the initial link, the temporary link value, the new temporary link and the file name of a variable in three key value pairs; storing the key-value pairs into a HashMap object;
the file tracing module is used for designating a file to be traced in a tracing stage, searching a HashMap object through the file name of the file to be traced, and finding an initial link corresponding to the file to be traced through the three key value pairs.
Further, the obtaining module is further specifically: creating and initializing a HashMap empty object of a hash table; during program operation, obtaining a temporary link on a page according to the initial link, and forming a variable temporary link: storing the key-value pair of the variable initial link into a HashMap object; and then obtaining new temporary links by the temporary links, searching layer by layer until no new temporary links exist, and forming a plurality of variable new temporary links: the key-value pairs of the variables are temporarily linked, and the key-value pairs are stored in the HashMap object; when the new temporary link is found to be a download link, the file can be downloaded, the file name of the download file is obtained, and a variable file name is formed: and (4) storing the key-value pair of the new temporary link of the variable into the HashMap object.
Further, the file tracing module further specifically includes: in the source tracing stage, a file to be traced is designated, and the file name of the file to be traced is used as a key; and searching a value corresponding to the key in the HashMap object, namely, the value is obtained from the variable file name: obtaining a new temporary link of the variable from the key value pair of the new temporary link of the variable, and then taking the value of the new temporary link of the variable as a key to the new temporary link of the variable: and searching a new value in the key value pair of the temporary variable link, and searching repeatedly until the initial link is found, so that the tracing is completed.
Further, the implementation manner of obtaining the new temporary link by the temporary link is as follows: after the temporary link is obtained, the hyperlink on the page of the temporary link is searched to be recorded as a new temporary link by clicking the temporary link, and the hyperlink comprises a clickable label, a picture and a dynamic frame.
The invention has the beneficial effects that: 1. this traceability aspect is currently used to track pirated games, helping companies collect pirated game information and obtain evidence. 2. Sites where popular files are transferred can be tracked, and for example, popular pirate games can be distributed through a plurality of sites and can be collected. 3. The copyrighted file is stolen by value shifting to other portal websites for collection and tracking, so that the benefits of the company are guaranteed. 4. Based on HashMap storage, the storage and query time is fast, and the file tracing efficiency is high.
Drawings
FIG. 1 is a schematic flow diagram of the process of the present invention.
Fig. 2 is a block diagram of the system architecture of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, the method for tracing the source of the downloaded file based on HashMap of the present invention includes the following steps: step S1, establishing a HashMap object of a hash table, and constructing three key value pairs in program operation, wherein the key value pairs are composed of keys and two variables of values, and the three key value pairs are respectively: (variable temporary Link: variable initial Link), (variable New temporary Link: variable temporary Link), (variable filename: variable New temporary Link); in the three key value pairs, the former is a key and the latter is a value;
step S2, when the page of the website is accessed, the initial link, the temporary link, the new temporary link and the file name are obtained and correspondingly stored in the variable initial link, the variable temporary link value, the variable new temporary link and the variable file name in the three key value pairs; storing the key-value pairs into a HashMap object; before the program runs, an initial link is appointed, a temporary link is obtained through a webpage of the initial link during running, and when the temporary link is obtained, whether the new temporary link is a download link or not is judged, namely the download link can be downloaded again to obtain a file.
Step S3, in the source tracing stage, designating the file to be traced, searching for the HashMap object according to the file name of the file to be traced, and finding the initial link corresponding to the file to be traced according to the three key value pairs.
The step S2 further includes: step S21, creating and initializing a HashMap empty object of the hash table;
step S22, during program operation, obtaining a temporary link on the page according to the initial link, and forming a variable temporary link: storing the key-value pair of the variable initial link into a HashMap object;
step S23, obtaining new temporary links by the temporary links, and searching layer by layer until there is no new temporary link and a plurality of variables are formed as new temporary links: the key-value pairs of the variables are temporarily linked, and the key-value pairs are stored in the HashMap object; the implementation mode of obtaining the new temporary link by the temporary link is as follows: after the temporary link is obtained, the hyperlink on the page of the temporary link is searched to be recorded as a new temporary link by clicking the temporary link, and the hyperlink comprises a clickable label, a picture and a dynamic frame. Layer by layer means that if a new temporary link is searched for by a temporary link, it is found that the new temporary link is not a downloadable link or an artificially set endpoint, it can then be used as a temporary link to search for the new temporary link until the endpoint is reached, and thus, a plurality of (variable new temporary link: variable temporary link) key-value pairs can be formed.
Step S24, when the new temporary link is found to be a download link, the file can be downloaded, the filename of the download file is obtained, and a variable filename is formed: and (4) storing the key-value pair of the new temporary link of the variable into the HashMap object.
The step S3 further includes: step S31, in the tracing stage, the file to be traced is designated, and the file name of the file to be traced is used as a key;
step S32, find the value corresponding to the key in the HashMap object, that is, from the variable file name: the key value pair of the variable new temporary link obtains the variable new temporary link,
step S33, using the value of the new temporary link of the variable as a key to the new temporary link of the variable: and searching a new value in the key value pair of the temporary variable link, and searching repeatedly until the initial link is found, so that the tracing is completed.
The invention is further illustrated below with reference to a specific embodiment:
a, recording:
1. specify a number of private initial links such as http:// www.1132my.com/30/, http:// www.27my.com.cn:90, and so on;
2. the initial link is opened automatically and from the hyperlink (temporary link) on the linked page, the key-value pair (variable temporary link: variable initial link) is noted (("https:// www.lanzous.com/i82 hsyj": http:// www.1132my.com/30/"),
(“http://www.27my.com.cn:90/index.htm”：“http://www.27my.com.cn:90”),
("http:// top. shoukabao. com:66/ch/a. html
And storing the data into a HashMap object;
3. like the second step to automatically open the temporary link and obtain a new temporary link, the key-value pair (variable new temporary link: variable temporary link) is as follows:
("http:// www.27my.com.cn: 90/magic war zone. rar":
“http://www.27my.com.cn:90/index.htm”),
(“http://www.27my.com.cn:90/xx.htm”:”http://www.27my.com.cn:90/index.htm”)
(https:// www.lanzous.com/i82 hsyj/Dragon magic field. zip ": https:// www.lanzous.com/i82 hsyj"), etc.) and into a HashMap object;
4. it is determined whether the new temporary link is an end point even though the link may be downloaded or an artificially specified end point is reached (an artificially specified is to discard the new link when it is found not to be in the set we want). If not, repeatedly entering the step 3 by using the temporary link identity, otherwise, constructing a key-value pair (variable file name: variable new temporary link):
("magic war magic field rar": http:// www.27my.com.cn: 90/magic war field rar ")
(r ": https:// www.lanzous.com/i82 hsyj/dragonfish magic domain zip") and so on key-value pairs) and into a HashMap object;
b, tracing source stage:
when the analysis work of the private program is finished, the source tracing is required:
1. designating file name "Longteng magic field-rar" as key
2. Find into HashMap object (variable filename: variable New temporary Link), get ("Dragon magic Domain. rar": https:// www.lanzous.com/i82 hsyj/Dragon magic Domain. zip ")
3. It was found that "https:// www.lanzous.com/i82 hsyj/Dragon magic field.zip" was not the initial link. Then look into the HashMap object (variable new temporary link: variable temporary link) with "https:// www.lanzous.com/i82 hsyj/Dragon magic field.zip" as a key, resulting in ("https:// www.lanzous.com/i82 hsyj/Dragon magic field.zip": https:// www.lanzous.com/i82hsyj ");
it was found that "https:// www.lanzous.com/i82 hsyj" was not the initial link. Then look into the HashMap object (variable temporary Link: variable initial Link) with "https:// www.lanzous.com/i82 hsyj" as the key, get ("https:// www.lanzous.com/i82 hsyj": http:// www.1132my.com/30/"), repeat as follows, and finally find" http:// www.1132my.com/30/"as the initial Link.
As shown in fig. 2, the present invention further provides a downloaded file tracing system based on HashMap, where the system includes a key-value pair setting module, an obtaining module, and a file tracing module;
the key value pair setting module is used for establishing a HashMap object of a hash table, and during program operation, three key value pairs are established, wherein each key value pair consists of a key and a value, and the three key value pairs are respectively as follows: the variables are temporarily linked: initial linking of variables, new temporary linking of variables: variable temporary link, variable filename: a new temporary link to a variable;
the acquisition module is used for acquiring an initial link, a temporary link, a new temporary link and a file name when a page of a website is accessed, and correspondingly storing the initial link, the temporary link value, the new temporary link and the file name of a variable in three key value pairs; storing the key-value pairs into a HashMap object;
the file tracing module is used for designating a file to be traced in a tracing stage, searching a HashMap object through the file name of the file to be traced, and finding an initial link corresponding to the file to be traced through the three key value pairs.
The obtaining module is further specifically: creating and initializing a HashMap empty object of a hash table; during program operation, obtaining a temporary link on a page according to the initial link, and forming a variable temporary link: storing the key-value pair of the variable initial link into a HashMap object; and then obtaining new temporary links by the temporary links, searching layer by layer until no new temporary links exist, and forming a plurality of variable new temporary links: the key-value pairs of the variables are temporarily linked, and the key-value pairs are stored in the HashMap object; when the new temporary link is found to be a download link, the file can be downloaded, the file name of the download file is obtained, and a variable file name is formed: and (4) storing the key-value pair of the new temporary link of the variable into the HashMap object. The implementation mode of obtaining the new temporary link by the temporary link is as follows: after the temporary link is obtained, the hyperlink on the page of the temporary link is searched to be recorded as a new temporary link by clicking the temporary link, and the hyperlink comprises a clickable label, a picture and a dynamic frame. Layer by layer means that if a new temporary link is searched for by a temporary link, it is found that the new temporary link is not a downloadable link or an artificially set endpoint, it can then be used as a temporary link to search for the new temporary link until the endpoint is reached, and thus, a plurality of (variable new temporary link: variable temporary link) key-value pairs can be formed.
The file tracing module is further specifically: in the source tracing stage, a file to be traced is designated, and the file name of the file to be traced is used as a key; and searching a value corresponding to the key in the HashMap object, namely, the value is obtained from the variable file name: obtaining a new temporary link of the variable from the key value pair of the new temporary link of the variable, and then taking the value of the new temporary link of the variable as a key to the new temporary link of the variable: and searching a new value in the key value pair of the temporary variable link, and searching repeatedly until the initial link is found, so that the tracing is completed.
In a word, in the recording stage, a HashMap object of a hash table is established firstly; during program operation, three key value pairs are constructed, namely (variable temporary link: variable initial link), (variable new temporary link: variable temporary link), (variable file name: variable new temporary link). And storing the key value pairs into a HashMap object, appointing a file to be traced in a tracing stage, and searching the HashMap object through a file name to efficiently and conveniently find the appointed initial link.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (8)
1. A downloaded file tracing method based on HashMap is characterized in that: the method comprises the following steps: step S1, establishing a HashMap object of a hash table, and constructing three key value pairs in program operation, wherein the key value pairs are composed of keys and two variables of values, and the three key value pairs are respectively: the variables are temporarily linked: initial linking of variables, new temporary linking of variables: variable temporary link, variable filename: a new temporary link to a variable;
step S2, when the page of the website is accessed, the initial link, the temporary link, the new temporary link and the file name are obtained and correspondingly stored in the variable initial link, the variable temporary link value, the variable new temporary link and the variable file name in the three key value pairs; storing the key-value pairs into a HashMap object;
step S3, in the source tracing stage, designating the file to be traced, searching for the HashMap object according to the file name of the file to be traced, and finding the initial link corresponding to the file to be traced according to the three key value pairs.
2. The method of claim 1, wherein the source tracing of the downloaded file based on the HashMap comprises: the step S2 further includes: step S21, creating and initializing a HashMap empty object of the hash table;
step S22, during program operation, obtaining a temporary link on the page according to the initial link, and forming a variable temporary link: storing the key-value pair of the variable initial link into a HashMap object;
step S23, obtaining new temporary links by the temporary links, and searching layer by layer until there is no new temporary link and a plurality of variables are formed as new temporary links: the key-value pairs of the variables are temporarily linked, and the key-value pairs are stored in the HashMap object;
step S24, when the new temporary link is found to be a download link, the file can be downloaded, the filename of the download file is obtained, and a variable filename is formed: and (4) storing the key-value pair of the new temporary link of the variable into the HashMap object.
3. The method of claim 1, wherein the source tracing of the downloaded file based on the HashMap comprises: the step S3 further includes: step S31, in the tracing stage, the file to be traced is designated, and the file name of the file to be traced is used as a key;
step S32, find the value corresponding to the key in the HashMap object, that is, from the variable file name: the key value pair of the variable new temporary link obtains the variable new temporary link,
step S33, using the value of the new temporary link of the variable as a key to the new temporary link of the variable: and searching a new value in the key value pair of the temporary variable link, and searching repeatedly until the initial link is found, so that the tracing is completed.
4. The method of claim 1, wherein the source tracing of the downloaded file based on the HashMap comprises: the implementation mode of obtaining the new temporary link by the temporary link is as follows: after the temporary link is obtained, the hyperlink on the page of the temporary link is searched to be recorded as a new temporary link by clicking the temporary link, and the hyperlink comprises a clickable label, a picture and a dynamic frame.
5. A downloaded file traceability system based on HashMap is characterized in that: the system comprises a key value pair setting module, an acquisition module and a file tracing module;
the key value pair setting module is used for establishing a HashMap object of a hash table, and during program operation, three key value pairs are established, wherein each key value pair consists of a key and a value, and the three key value pairs are respectively as follows: the variables are temporarily linked: initial linking of variables, new temporary linking of variables: variable temporary link, variable filename: a new temporary link to a variable;
the acquisition module is used for acquiring an initial link, a temporary link, a new temporary link and a file name when a page of a website is accessed, and correspondingly storing the initial link, the temporary link value, the new temporary link and the file name of a variable in three key value pairs; storing the key-value pairs into a HashMap object;
the file tracing module is used for designating a file to be traced in a tracing stage, searching a HashMap object through the file name of the file to be traced, and finding an initial link corresponding to the file to be traced through the three key value pairs.
6. The HashMap-based downloaded file traceability system of claim 5, wherein: the obtaining module is further specifically: creating and initializing a HashMap empty object of a hash table; during program operation, obtaining a temporary link on a page according to the initial link, and forming a variable temporary link: storing the key-value pair of the variable initial link into a HashMap object; and then obtaining new temporary links by the temporary links, searching layer by layer until no new temporary links exist, and forming a plurality of variable new temporary links: the key-value pairs of the variables are temporarily linked, and the key-value pairs are stored in the HashMap object; when the new temporary link is found to be a download link, the file can be downloaded, the file name of the download file is obtained, and a variable file name is formed: and (4) storing the key-value pair of the new temporary link of the variable into the HashMap object.
7. The HashMap-based downloaded file traceability system of claim 5, wherein: the file tracing module is further specifically: in the source tracing stage, a file to be traced is designated, and the file name of the file to be traced is used as a key; and searching a value corresponding to the key in the HashMap object, namely, the value is obtained from the variable file name: obtaining a new temporary link of the variable from the key value pair of the new temporary link of the variable, and then taking the value of the new temporary link of the variable as a key to the new temporary link of the variable: and searching a new value in the key value pair of the temporary variable link, and searching repeatedly until the initial link is found, so that the tracing is completed.
8. The HashMap-based downloaded file traceability system of claim 5, wherein: the implementation mode of obtaining the new temporary link by the temporary link is as follows: after the temporary link is obtained, the hyperlink on the page of the temporary link is searched to be recorded as a new temporary link by clicking the temporary link, and the hyperlink comprises a clickable label, a picture and a dynamic frame.
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