CN102510536A - Method for downloading videos and audios of internet - Google Patents
Method for downloading videos and audios of internet Download PDFInfo
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Abstract
A method for downloading videos and audios of the internet belongs to the field of the internet and overcomes the problem that the videos and the audios cannot be downloaded due to the fact that complicated scripts and network addresses of videos in FLV (flash video) formats cannot be processed in analysis of the network audio and video programs during downloading of the videos and the audios of the internet. Access characteristics of browsing video and audio pages by users and HTTP (hypertext transport protocol) network characteristics of addresses of the audios and the video programs are utilized sufficiently, universal judgment on the analysis of the addresses of the network audios and videos is realized by analyzing the intercepted HTTP header information, and finally the audio and the video programs are downloaded successfully. The method for downloading videos and audios of the internet solves the problem about high-efficiency address analysis and downloading of the audio and video files for the supervision department.
Description
Technical field
The present invention relates to network communications technology field, more specifically, the present invention relates to the method that a kind of the Internet audio frequency and video are downloaded.
Background technology
Supervision department need find and download its online audio/video program effectively, supervises and manages with realization.It is exactly along with the growth of network video programs in recent years that the Internet audio/video program is downloaded, especially the growth of the video of FLV form and growing up.The key that the Internet audio frequency and video are downloaded is the discovery of addresses of network video programs, and the difficulty that this problem faces mainly is that the complicated script of the page that comprises audio/video program is difficult to handle, and the address of FLV video is difficult to obtain from page analysis.The user cannot download in watching the process of video, and online watching again cushioned in the face of continuous, and the analyzing and processing of these video files is also needed file in download.Therefore, for supervision department, audio-video document address resolution efficiently and download have important practical significance.
Special address resolution and the downloaded software that have some similar functions at present, but these software processes website limited amounts to the FLV video, underaction.Aspect parse addresses, generally also be confined to judge through the suffix name, can't effectively obtain the network address that comprises complex script and FLV format video in the present video frequency program.Aspect download, generally just individual task is handled, can not realize the work of Multi-task Concurrency.Aspect software architecture, belong to client application basically, incompatibility is handled on a large scale.
Summary of the invention
For overcome addresses of network video programs in the Internet audio frequency and video downloading process resolve face can't handle the network address with complex script and FLV format video and the problem that causes downloading these audio frequency and video the present invention proposes a kind of the Internet audio frequency and video method for down loading.
A kind of the Internet audio frequency and video method for down loading is characterized in that may further comprise the steps:
1), audio/video program play web page interlinkage obtain, and the parsing formation is put in these links;
2), take out audio/video program and play web page interlinkage, go visit with browser, so that these audio frequency and video of the player plays in the webpage;
3), said player is through the said webpage of network requests; Said browser display request results; And the hyperlinked page surface element in the back page is asked once more; When the audio/video player of request ready, audio/video player according to the parameter of page transmission from long-range reading of data source and play;
4), carry out obtaining information mutual between the two in the mutual process at said audio/video player and website;
Mutual information comprises the audio-video document address structure at least, and said audio-video document address structure comprises seed, key1, key2, fileid and segs information; Application system current time and random number are calculated sid, and sid is the part of the final audio-video document network address; Use fileid and seed field and generate fileID, fileID is the part of the final audio-video document network address; Use key1 and key2 field and generate key, key is the part of the final audio-video document network address; Sid, fileID, key are merged, obtain the first section network address of audio-video document; As if not segmentation of audio frequency and video, be the network address of this audio-video document; If the audio frequency and video segmentation according to the value of segs field, is revised the part value of the first section network address, can obtain the network address of every section audio-video document;
5), the download formation being put in the audio/video program address that is obtained downloads.
Further, it is characterized in that:
Step 2) in, when said audio/video player can not be play automatically: whether comprise Object or Embed label through the identification page, the page that does not comprise said label substance is filtered; Through the Object that comprises in the page or the size of Embed element are discerned, the page that does not comprise video frequency program is filtered; Through identification, audio/video player is distinguished with the Object or the Embed element of advertisement mutually the dimension information of the Object that comprises in the page or Embed element; , the dimensional structure of player in the webpage and control button confirm that JavaScript script trigger event is called in the configuration of the fixed with relative positions that button is distributed, and realizes that the automatically clicking of audio frequency and video website player is play through being distributed.
Further, it is characterized in that:
In the step 4), carry out in the mutual process at said audio/video player and website, set up characteristic descriptor set for each audio frequency and video website, each characteristic descriptor set has been described the characteristic information of audio frequency and video websites; The characteristic information of said website comprises one or more of audio/video player type, website audio-video document type or audio-video document address character string characteristic.
Further, it is characterized in that:
In the step 5), the true address of the audio/video program that has parsed is put into the download formation,, realize the multitask download through concurrent mechanism.
The present invention makes full use of the user to the access characteristics of browsing the audio frequency and video page and the HTTP network characterization of audio/video program address class; Through analyzing the HTTP header of intercepting and capturing; Realized more general judgement, finally realized the download of the Internet audio/video program the network audio-video address resolution.
Utilize the browser control and the network address to monitor the mode that combines and find the network audio-video address; And application browser judges whether the page comprises the broadcast of audio/video player and controls playing device; Solve the problem that audio frequency and video page script complicacy and FLV are difficult to obtain from the page address; Simultaneously, solved the automation address discovery problem that this type user clicks this type webpage that could play.
Download formation and thread pool working mechanism through setting, realized the mode of operation that Multi-task Concurrency is downloaded, improved resource utilization ratio and operating efficiency.Download through service end, the client has realized the unified plan of system through the mode of browser monitoring.
Description of drawings
Fig. 1 carries out the overview flow chart that the Internet audio frequency and video are downloaded according to the present invention
Fig. 2 is the concrete applicating flow chart that the Internet audio frequency and video are downloaded
Embodiment
Below in conjunction with accompanying drawing and practical implementation instance a kind of the Internet provided by the invention audio/video program method for down loading is described in detail.
There is two large problems in the network video programs downloading process at present; Mainly be aspect address resolution; One is the problem of complex script, in the statistical observation of a large amount of audio frequency and video websites is analyzed, finds that the website provides the webpage of audio/video program to comprise complicated javascript script; Content for script also has nothing in common with each other; The javascript script is encrypted audio/video information (such as the network address), and the audio frequency and video website also carried out obscuring processing to the javascript script, is difficult to obtain the audio-video network address through resolving the javascript script.Another is the problem that can't obtain player internal information in the webpage; Because browser is supported plug-in unit usually; Most of video website is used the video of FLV form, and this type video frequency program occupies the quantity more than 90% in current video program, and uses the FLASH player plays at browser client; These video address can't obtain from content of pages, and these FLASH plug-in unit internal informations also can't obtain from browser.Because the address of audio frequency and video can't be resolved, for follow-up download causes great difficulty.
Through method of the present invention; The intercepted data packet analysis is found; Which kind of audio frequency and video play mode no matter, the packet that this machine is communicated by letter with the website can't be hidden, therefore through intercepting and capturing data mutual between browser and the website and analyzing; Can obtain the audio frequency and video address information, download thereby accomplish.
Fig. 1 carries out the overview flow chart that the Internet audio frequency and video are downloaded according to the present invention; In according to one embodiment of present invention; A kind of method of resolving and downloading the Internet audio/video program is to utilize browser control with network monitoring, watch the operating characteristics of internet program, the batch video network address discovery service that the network service characteristic forms a kind of comprehensive automation through user capture, and the task queue of download thread pond is put in the audio-video network address that parses accomplish download.
As shown in Figure 1; At first browser is intercepted and captured the mutual information of player and website in the browser in the initialization system; Request data package and response data packet to based on http protocol are analyzed, and take a decision as to whether the page of this website according to the characteristic descriptor set of each website.
Browser is opened the webpage that comprises video frequency program then, perhaps opens a plurality of links that comprise video frequency program, waits for the video player buffering of embedded web page and the broadcast of beginning program then; If some video player requirement user this moment clicks start button and could play, need wait for broadcast again at broadcast button relevant position a mouse click.
When browser is opened webpage; Suppose that webpage is a webpage that comprises video frequency program; Should there be the embedding player in its web page contents; And the player of displaying video programs is embedded within Object or the Embed label usually, and whether comprising these two labels through the identification page can fall the home page filter that a part does not comprise video frequency program, thereby avoids insignificant analysis.In addition; Different audio-video website player has the different visual size; Its player size basic fixed, and generally in webpage, occupy visibility point comparatively placed in the middle is through to the size that comprises the Object/Embed element in the page and the identification of positional information; Can the home page filter that a part does not comprise video frequency program be fallen, thereby avoid insignificant analysis; And can player be distinguished with the Object/Embed element of other commercial papers mutually, thus realize automation to player operation.
Suppose that certain website is the website that a specialty provides Video service; Data source and suite of services system with autonomous property right; The website provides Video service generally can use fixing one or several specific player, and for these specific players, the dimensional structure of player is identical; Control button also is distributed in fixing relative position; Through configuration, can realize that mouse beacon is realized the automatic operation to broadcast button to the interactive operation of the click broadcast of specific website to fixed with relative positions.
After video frequency program is clicked broadcast; Player is to this video frequency program of web site requests, and browser shows the result, and other page elements that comprise player that will need are asked once more; Obtain and show; Ready when the player of request, player obtains the network address of the video source of needs request according to the parameter of page transmission, begins from long-range reading of data source and plays.Through the communication data of intercepting and capturing and analysis browser and website, thus the real video program data source address of using in the acquisition playing process.
Suppose that certain website is data source and the suite of services system that a specialty provides the website of Video service to have autonomous property right; The website is when providing Video service; Also have following similitude: (1) player similitude, website are generally selected fixing one or several player for use; (2) similitude of website audio-video document type, website provide the file type of Video service generally fixing; (3) similitude of website audio-video document address structure, the data source that video generally is provided is from specific several domain names or IP address; (4) video file address character string characteristic similarity, the bibliographic structure of this address has similitude.
Based on above similitude, from network http protocol layer, the request of this video class address has the characteristic that is different from other; And has similitude: (1) http protocol head User-Agent; Concerning player, this is the classification explanation of player, and the player that different company produces is different; This can be used to distinguish video request and non-video request, also can be used to distinguish the request of different players; (2) Referer of HTTP head; Owing to use player source basic fixed; The source that the Referer of video address request indicates request is the address of player just, can be used to distinguish video and non-video request, concerning different websites; Because this location conten is different basically, therefore can be used to distinguish the request of different websites; (3) http protocol head Content-Type, this territory is used for representing the demand file type, can be in order to distinguish; (4) Content-Length, this domain representation backspace file size, size can be in order to identification greater than the characteristic of other class files usually according to audio-video document; (5) file URL characteristic, the address of generally independent Video service be from fixing several IP or domain name, and, also close usually on the bibliographic structure of URL, such as the length of every grade of catalogue, whole directory levels, URL comprises fixed character string etc.
Because the URL that comes out according to the information analysis of intercepting and capturing is independent fully; With the URL corresponding difficulty of the audio frequency and video URL that analyzes with the page that comprises these audio frequency and video; Usually analysis audio frequency and video address that can only serial; Through setting up characteristic descriptor set according to above-mentioned several characteristic, thereby accomplish the parallel address discovery of a plurality of websites for each website.Because the characteristic of different web sites can be distinguished each other, thereby accomplish the serial of single website, the parallel address discovery in many websites, improve and find efficient.
Fig. 2 representes a concrete implementation procedure of the inventive method, and is as shown in the figure:
Step S1, unlatching task (being the page link address that audio frequency and video are play) is surveyed thread.This thread is an application program background work thread, is used for accomplishing reading task to be downloaded from database.
Step S2 is provided with timer, regularly database is checked.In order to accomplish when the downloading task, start the effect of download module at once, need to set a timer, check new task according to the time interval of setting.
Step S3, task is surveyed the time interval regular check new task that thread is set according to timer.When new task exists, this task is loaded on work queue.If there is not new task, then continue the regular check new task.
Step S4, this chained address of browser access.From work queue, take out one and play chained address, the long-range Web of browser access.
Step S5, browser judges according to the page info that returns whether this page is legal.Promptly whether comprise Object or Embed label, the page that does not comprise said label substance is filtered through the identification page.Through Object or the size of Embed element and the identification of positional information, the page that does not comprise video frequency program is filtered comprising in the page.Through Object or the size of Embed element (Object and Embed element all are the labels in the html language) and the identification of positional information, audio/video player is distinguished with the Object or the Embed element of advertisement mutually comprising in the page., the dimensional structure of flash player, Windows media player and control button confirm that the configuration of the fixed with relative positions that button is distributed realizes that the automatically clicking of audio frequency and video website player is play through being distributed.
Step S6 obtains the mutual information in browser and website.Browser and long-range communicates through http protocol.Monitor the HTTP request message that browser sends, store this request header information, this request is handled, return http response message.Store this head response information, and it is transmitted to browser.Through said process, get access to header mutual between browser and the website.
Step S7 judges through the header that the feature description set pair obtains.Characteristic descriptor set has all been set up in each audio frequency and video website, the characteristic information of the corresponding website of characteristic descriptor set.Analyze the solicited message of audio/video player, according to the solicited message of analyzing,, that the audio frequency and video URL that analyzes is corresponding with the page address that comprises these audio frequency and video through the characteristic descriptor set that coupling is set up.The characteristic information of said website is respectively audio/video player type, website audio-video document type, website audio-video document address structure and audio-video document address character string characteristic.Comprise the http protocol head Content-Type of the http protocol head User-Agent of expression audio/video player type, the HTTP head Referer that representes the address of audio/video player, expression demand file type, the Content-Length and the file URL characteristic of expression backspace file size in the described request information.
With certain net is example, and there are following characteristics this audio-video network address, website: the address dynamically generates, and the address that each request is returned is all different; Effective time is short, and the download address that obtains has only one hour effective time; Video address need be deciphered client (user) through encrypting; Long video council is divided into the short-sighted frequency of multistage; Video is downloaded not restriction, i.e. the download address that obtains of user A, user B also can download.The audio/video player type of this website is that Flash player, file type are flv (the SD video only is discussed here), the audio-video document address structure character string (character string of json form is the form of information exchange in a kind of network) with the json form.Promptly come construction feature to describe collection, to confirm the network address of audio-video document with the field in this json character string.From concentrated seed, key1, key2, fileid, the segs field of reading of this feature description; Application system current time and random number are calculated sid (sid is the part of the final audio-video document network address); Use fileid and seed field and generate filelD (filelD is the part of the final audio-video document network address), use key1 and key2 field and generate key (key is the part of the final audio-video document network address).Sid, filelD, key are merged, obtain the first section network address (, being the network address of this audio-video document) of audio-video document as if not segmentation of audio frequency and video.According to the value of segs field, revise the part value of the first section network address, can obtain the network address of every section audio-video document.
The first step: application system current time and random number are calculated sid
Second step: use fileid and seed field and generate filelD
The 3rd step: use key1 and key2 field and generate key
The 4th step:, revise the part value of the first section network address according to the value of segs field
With certain net audio frequency and video is example, and there are following characteristics this audio-video network address, website: the address dynamically generates, and the address that each request is returned is all different; The long video council is divided into the multistage video; To being loaded with certain restriction under the audio frequency and video, download address is only effective to the user-agent identical with the browser of request, and this just means that the party A-subscriber with the address that the A browser obtains, can only use the A browser downloads, even it is also not all right to change a B browser.The audio/video player type of this website is that Flash player, file type are flv (the SD video only is discussed here).
Certain net audio frequency and video broadcast address has two kinds of forms: first kind of audio frequency and video broadcast address do not demonstrate the value of iid field, demonstrated the value of iid field in second kind of audio frequency and video broadcast address.The former need should play the page in visit, in the page source code, obtained the value of iid field.Obtain the xml character string of audio-video document address with this iid field.The audio-video document address structure is with the character string of xml form.Promptly come construction feature to describe collection, to confirm the network address of audio-video document with the field in this xml character string.Read vi, f field from this feature description is concentrated, to obtain the network address of this audio-video document.
Step S8 according to the result that characteristic descriptor set is judged, confirms whether the information of analyzing is the download address of audio frequency and video.If download address then adds thread pool with this address and downloads formation.If not, then continue to judge the message that next bar obtains according to the characteristic decision tree.
Step S9, the download thread pond obtains a downloading task from download formation.If there is idle download thread in the current thread pond, then opens and download.If there is not idle thread, then wait for having downloading task to accomplish till idle thread is arranged.
Step S10, the downloading task initialization.The different audio-video website is to self audio-video document address protection strategy difference, and the address that the message analysis that obtains is obtained through the characteristic decision tree is not all to be the address of band suffix .flv .f4v type, like certain audio-video document address.Therefore need before download, further handle, promptly redispatch once to the solicited message of this address, to obtain the address of band suffix name .flv .f4v to this address.
Step S11, download thread is set up the network connection and is carried out Network Transmission according to the audio frequency and video address of band suffix name .flv .f4v, promptly begins to download, and finishes until downloading.
Method of the present invention has made full use of the characteristic of browser resolves audio frequency and video webpages and the network service characteristic of navigation process middle pitch video class address, thereby it is wide to have obtained a kind of RM scope of application, the network audio-video address discovery method that parallel ability is good.And use thread pool to carry out multi-task parallel and download, reached the concurrent control of task and the high usage of system resource.Experimental data proves; Under the experimental data of the page link address that given 10000 audio frequency and video are play, use this method and can correctly find 9153 audio-video document download address, having deleted the experiment embodiment that can not find because of video file is 182; Analyzing the failed experiments instance because of characteristic decision tree identification problem is 665; Find rate of accuracy reached 93.2%, therefore, under large-scale data application background, also have higher discovery accuracy rate.
What should explain at last is; Above embodiment is only in order to describe technical scheme of the present invention rather than the present technique method is limited; The present invention can extend to other modification, variation, application and embodiment on using, and therefore thinks that all such modifications, variation, application, embodiment are in spirit of the present invention and teachings.
Claims (4)
1. the Internet audio frequency and video method for down loading is characterized in that may further comprise the steps:
1), audio/video program play web page interlinkage obtain, and the parsing formation is put in these links;
2), take out audio/video program and play web page interlinkage, go visit with browser, so that these audio frequency and video of the player plays in the webpage;
3), said player is through the said webpage of network requests; Said browser display request results; And the hyperlinked page surface element in the back page is asked once more; When the audio/video player of request ready, audio/video player according to the parameter of page transmission from long-range reading of data source and play;
4), carry out obtaining information mutual between the two in the mutual process at said audio/video player and website;
Mutual information comprises the audio-video document address structure at least, and said audio-video document address structure comprises seed, key1, key2, fileid and segs information; Application system current time and random number are calculated sid, and sid is the part of the final audio-video document network address; Use fileid and seed field and generate fileID, fileID is the part of the final audio-video document network address; Use key1 and key2 field and generate key, key is the part of the final audio-video document network address; Sid, fileID, key are merged, obtain the first section network address of audio-video document; As if not segmentation of audio frequency and video, be the network address of this audio-video document; If the audio frequency and video segmentation according to the value of segs field, is revised the part value of the first section network address, can obtain the network address of every section audio-video document;
5), the download formation being put in the audio/video program address that is obtained downloads.
2. a kind of the Internet according to claim 1 audio frequency and video method for down loading is characterized in that:
Step 2) in, when said audio/video player can not be play automatically: whether comprise Object or Embed label through the identification page, the page that does not comprise said label substance is filtered; Through the Object that comprises in the page or the size of Embed element are discerned, the page that does not comprise video frequency program is filtered; Through identification, audio/video player is distinguished with the Object or the Embed element of advertisement mutually the dimension information of the Object that comprises in the page or Embed element; , the dimensional structure of player in the webpage and control button confirm that JavaScript script trigger event is called in the configuration of the fixed with relative positions that button is distributed, and realizes that the automatically clicking of audio frequency and video website player is play through being distributed.
3. a kind of the Internet according to claim 1 audio frequency and video method for down loading is characterized in that:
In the step 4), carry out in the mutual process at said audio/video player and website, set up characteristic descriptor set for each audio frequency and video website, each characteristic descriptor set has been described the characteristic information of audio frequency and video websites; The characteristic information of said website comprises one or more of audio/video player type, website audio-video document type or audio-video document address character string characteristic.
4. a kind of the Internet according to claim 1 audio frequency and video method for down loading is characterized in that:
In the step 5), the true address of the audio/video program that has parsed is put into the download formation,, realize the multitask download through concurrent mechanism.
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| CN114143577B (en) * | 2021-11-26 | 2023-10-24 | 中电信数智科技有限公司 | Video acquisition method and system |
| CN115278365A (en) * | 2022-09-26 | 2022-11-01 | 成都华栖云科技有限公司 | Website video acquisition method and system |
| CN115278365B (en) * | 2022-09-26 | 2023-01-03 | 成都华栖云科技有限公司 | Website video acquisition method and system |
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Application publication date: 20120620 |