CN103312792B - The method and system of file are read from external storage equipment - Google Patents

Abstract

The invention discloses a method and system for reading files from an external storage device. The present invention downloads a file from the network through an external storage device, and at the same time saves the identification information and the download address that uniquely identify the file, and the terminal device reads the identification information and the download address of the file in the external storage device, and then presses the Byte reads the file and records the current reading position in real time. When the terminal device encounters the external storage device does not exist or is unplugged during the process of reading the file downloaded by the external storage device, the terminal device can According to the identification information and the download address, if the network is available, download and read the content after the current reading position of the file when an exception occurs from the network side, and continue to read the remaining unfinished file content, thereby Make the file reading process uninterrupted, make full use of read resources, and improve the stability and practicality of system applications.

Description

Method and system for reading files from external storage device

technical field

The invention relates to the technical field of file reading and downloading, in particular to a method and system for reading files from an external storage device.

Background technique

In the process of the existing terminal device reading the file downloaded from the network by the external storage device, since the terminal device detects whether the file exists before reading the file, if the external storage device is pulled out, etc., the terminal device and the external storage When the device connection is abnormal, the terminal device will report an error and prompt processing, and terminate the reading process. Due to the interruption of the file reading process, the read resources will be wasted, thereby reducing the stability and practicality of the system application.

Contents of the invention

The main purpose of the present invention is to provide a method and system for reading files from an external storage device, aiming at solving the reading process by downloading from the network when the terminal device reads files from the external storage device when abnormal reading occurs abort problem.

A method for reading files from an external storage device, comprising the following steps:

The terminal device acquires identification information and a download address of the file in the external storage device, the identification information is used to uniquely identify the file, and the identification information and the download address are stored in the terminal device;

The terminal device reads the files in the external storage device;

When the terminal device detects that the connection between the external storage device and the terminal device is abnormal, it will record the current reading position;

The terminal device reads all content after the current reading position of the file from the network side according to the identification information and the current reading position.

Preferably, preferably,

Before the terminal device obtains the identification information of the file in the external storage device and the download address, it also includes:

The terminal device connected to the external storage device downloads and saves the file from the network to the external storage device, and simultaneously saves the identification information and download address corresponding to the file in the terminal device.

Preferably, the identification information includes at least the file name and download address of the file;

The terminal device reading the file specifically includes: the terminal device reading the file byte by byte in sequence.

Preferably, the step of the terminal device reading all content after the current reading position of the file from the network side according to the identification information and the current reading position specifically includes:

The terminal device searches for the file on the network side according to the identification information;

If the file exists, according to the current reading position, all bytes after the current reading position of the file are read from the network end byte by byte in order while downloading.

Preferably, the step of the terminal device searching for the file on the network side according to the identification information specifically includes:

The terminal device judges whether it is connected to the network;

If not, it prompts that the user is not connected to the network;

If so, search for the file on the network side according to the identification information; if the file does not exist, prompt the user that the file is not found.

The present invention further provides a system for reading files from an external storage device, including a terminal device, an external storage device and a network terminal, the external storage device is connected to the terminal device, and the terminal device is connected to the network terminal ,in,

The terminal device is used to obtain the identification information and download address of the file in the external storage device, the identification information is used to uniquely identify the file, and store the identification information and download address; read the file; detect the external When the connection between the storage device and the terminal device is abnormal, record the current reading position; read all content after the current reading position of the file from the network according to the identification information and the current reading position;

The external storage device is used to store the file for reading by the terminal device;

The network end is configured to provide the file, identification information corresponding to the file, and a download address for downloading by the terminal device connected to the external storage device.

Preferably, the terminal device is further configured to: when connected to an external storage device, download and save the file from the network to the external storage device, and simultaneously save the identification information and download address link corresponding to the file in the terminal device .

Preferably, the identification information includes the file name and download address of the file;

The terminal device is further configured to read the file byte by byte in sequence.

Preferably, the terminal device is also used for:

Search for the file at the network end according to the identification information; if the file exists, read the file from the network end byte by byte in order after the current read position according to the current read position all bytes of the .

Preferably, the terminal device is also used for:

Judging whether the terminal device is connected to the network; if not, prompting the user that it is not connected to the network; if so, searching for the file on the network according to the identification information; when not finding the file, prompting the user file not found

The present invention provides a method for reading a file from an external storage device. When the terminal device reads the file downloaded by the external storage device by byte, the current reading position is recorded in real time. When the terminal device reads the file In the process of fetching the file downloaded from the external storage device, the external storage device and the terminal device are not connected or the external storage device is unplugged, that is, when the connection between the external storage device and the terminal device is abnormal, the terminal device can The above identification information, when the network is available, download and read the byte after the current reading position of the file when an exception occurs from the network, and continue to read the remaining file content that has not been read. In the process of reading files, it is detected whether the external storage device is connected to the terminal device. When it is not connected, it is transferred to the network for reading according to the identification information stored in the terminal device, so that the file reading process will not be interrupted and the read file can be fully utilized. Resources, improve the stability and practicality of system applications. In addition, the present invention further provides a system corresponding to the above method.

Description of drawings

Fig. 1 is a flow chart of Embodiment 1 of the method for reading files from an external storage device according to the present invention;

Fig. 2 is a flowchart of Embodiment 2 of the method for reading files from an external storage device according to the present invention;

FIG. 3 is a flow chart of Embodiment 3 of the method for reading files from an external storage device according to the present invention;

FIG. 4 is a flow chart of Embodiment 4 of the method for reading files from an external storage device according to the present invention;

Fig. 5 is a schematic structural diagram of an embodiment of a system for reading files from an external storage device according to the present invention.

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

detailed description

It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The invention provides a method for reading a file from an external storage device. The method downloads the file from the network through a terminal device connected to the external storage device, and at the same time saves the identification information that uniquely identifies the file. When the storage device downloads files from the network, if the external storage device is not connected to the terminal device or the external storage device is unplugged during the reading process, the terminal device will not directly prompt an error, but will obtain the file ID Information, which includes the information required for downloading the file, such as the unique file identifier of the file. When the network is available, you can continue to read the unfinished remaining file content from the network side, so that the file reading process will not Interrupt, make full use of read resources, improve the stability and practicality of system applications.

Referring to accompanying drawing 1, Fig. 1 is the flow chart of Embodiment 1 of the method for reading files from an external storage device according to the present invention.

Embodiment 1 of the present invention proposes a method for reading files from an external storage device, including the following specific steps:

S11. The terminal device obtains the identification information and download address of the file in the external storage device, the identification information is used to uniquely identify the file, and the identification information and download address are stored in the terminal device;

In step S11, the terminal device acquires the identification information of the file in the external storage device, wherein the acquired file in the external storage device contains identification information that can be used to uniquely identify the file, and the identification information can be a generated file ID code Or include file attributes such as the file name of the file and the file download address. In addition, the terminal device also obtains the file download address, and the file download address includes the necessary information for downloading the file through the link of the file download address. Obtaining the file identification information is used to uniquely identify the file, and it can also solve the problem that when the file names may be the same, they cannot be distinguished only by the file name for processing.

In addition, the file in the external storage device read by the terminal device may be a single file, or a file collection composed of multiple files, and each file in the file collection includes the above-mentioned identification information. When the terminal device reads the file set in the external storage device, the identification information obtained by the terminal device also includes a list composed of identification information of each file in the file set.

S12. The terminal device reads the file in the external storage device;

S13. When the terminal device detects that the connection between the external storage device and the terminal device is abnormal, record the current reading position;

In step S13, during the process of the terminal device reading the files in the external storage device, the external storage device and the terminal device may not be connected or the external storage device is pulled out. The file is read from the storage device. At this time, the terminal device records the read position of the currently read file. Or, when reading multiple files, when the terminal device cannot read the remaining files in the above file collection from the external storage device, it can also record the position of the read file in the list and the location of the currently read file. The position to be read.

S14. The terminal device reads all content after the current reading position of the file from the network according to the identification information and the current reading position.

In step S14, after the terminal device judges that the terminal device is connected to the network according to the recorded reading position of the file and the obtained identification information of the file, it passes the identification information and reads from the obtained The recorded reading position starts downloading and continues reading after downloading. Alternatively, the terminal device obtains the identification information of the next file to be read in order according to the read position of the remaining files in the recorded file collection and according to the list of the obtained identification information, and determines that the terminal is located in the network After the terminal is in the connected state, the identification information is used to start downloading from the recorded reading position and continue reading after downloading.

In the embodiment of the present invention, the terminal device reads the identification information corresponding to the file stored in the terminal device before reading the file in the external storage device, and the terminal device reads the file byte by byte in order during the process of reading the file. When reading the file, when the connection between the terminal device and the external storage device is abnormal such as the external storage device is pulled out during the reading process, the terminal device will not directly prompt an error, but will record the current reading position of the currently read file , and according to the identification information of the obtained file, when the network is available, continue to read the unfinished remaining file content from the network, so that the file reading process will not be interrupted, make full use of the read resources, improve the system App stability and usability.

In the embodiment of the present invention, terminal equipment includes but not limited to computers, smart TVs, smart phones, set-top boxes, etc., external storage devices include but not limited to SD cards, U disks, hard disks, floppy disks, optical disks, etc. Terminal connection channels include but are not limited to network cable, wifi, 3G, GSM, CDMA, bluetooth, infrared, etc.

Referring to FIG. 2 , FIG. 2 is a flow chart of Embodiment 2 of the method for reading files from an external storage device according to the present invention.

In this embodiment, step S10 is also included before the step S11: the terminal device connected to the external storage device downloads and saves the file from the network to the external storage device, and at the same time saves the identification information and download address corresponding to the file in the terminal device.

In step S10, when downloading a file through an external storage device, the terminal device first obtains the identification information and the download address, then generates a non-repetitive external storage device file storage address, and associates the identification information, download address and file storage address to the terminal device (can be saved to a database, file or flash, etc.), then download the file and save the downloaded file to the external storage device according to the generated file storage address. When the terminal device reads the file in the external storage device, First, the identification information of the file stored in the terminal device is obtained, which avoids the problem that the terminal device cannot obtain the identification information when reading the file in the external storage device when the connection between the external storage device and the terminal device is abnormal.

Referring to FIG. 3 , FIG. 3 is a flow chart of Embodiment 3 of the method for reading files from an external storage device according to the present invention.

In this embodiment, on the basis of Embodiment 1, the step S14 specifically includes the following steps:

S141. The terminal device searches for the file on the network side according to the identification information;

S142. If the file exists, according to the current reading position, read all the bytes after the current reading position of the file from the network side while downloading byte by byte in sequence.

Referring to FIG. 4 , FIG. 4 is a flow chart of Embodiment 4 of the method for reading files from an external storage device according to the present invention.

In this embodiment, on the basis of Embodiment 1, the step S141 specifically includes the following steps:

S1411. The terminal device judges whether it is connected to the network;

S1412. If not, prompting that the user is not connected to the network;

S1413. If yes, search for the file on the network side according to the identification information; if the file does not exist, prompt the user that the file is not found. If yes, go to step 142.

The present invention further provides a system for reading files from an external storage device.

Referring to FIG. 5 , FIG. 5 is a structural diagram of an embodiment of a system for reading files from an external storage device according to the present invention.

In this embodiment, a system for reading files from an external storage device includes a terminal device 1, an external storage device 2, and a network terminal 3. The terminal device 1 is connected to the external storage device 2, and the terminal device 1 passes through a network channel Connected to network terminal 3, where,

The terminal device 1 is used to save and obtain the identification information and the download address of the file in the external storage device 2, the identification information is used to uniquely identify the file, and the identification information and the download address are stored in the terminal device 1; Read the file; when an abnormal connection between the external storage device 2 and the terminal device 1 is detected, according to the identification information and the current reading position, read all content after the current reading position of the file from the network terminal 3, The terminal device is also used to generate non-duplicate file storage addresses of the external storage device;.

The terminal device 1 obtains the identification information and download address of the file in the external storage device 2. The identification information can be a generated file ID code or file attributes including the file name and file download address of the file. The download address includes a file download address link, etc. Information necessary to download the file.

In addition, the file in the external storage device 2 read by the terminal device 1 may be a single file or a file set composed of multiple files, and each file in the file set includes the above-mentioned identification information. When the terminal device 1 reads the file set in the external storage device 2 , the terminal device 1 obtains a list composed of identification information of each file in the file set in the identification information. During the process of terminal device 1 reading files in the external storage device, the external storage device 2 and terminal device 1 may be disconnected or pulled out. Read the file. At this time, the terminal device 1 records the read position of the currently read file. Or, when the terminal device 1 cannot read the rest of the files in the file collection, it can also record the position of the read file in the list and the read position of the currently read file.

After the terminal device 1 judges that the terminal is set to be connected to the network according to the recorded reading position of the file, and according to the obtained identification information of the file, the terminal device 1 passes the identification information and reads from the recorded Read position to start downloading and continue reading after downloading. Alternatively, the terminal device 1 obtains the identification information of the next file to be read in sequence according to the read position of the remaining files in the recorded file collection and according to the list of the obtained identification information. After the terminal is in the connected state, the identification information is used to start downloading from the recorded reading position and continue reading after downloading.

The external storage device 2 is configured to store the file for acquisition by the terminal device 1;

The network terminal 3 is configured to provide the file, identification information and download address corresponding to the file, for the terminal device 1 connected to the external storage device 2 to download.

In the embodiment of the present invention, before reading the file in the external storage device 2, the terminal device 1 obtains the identification information corresponding to the file, and the terminal device 1 reads the file byte by byte in order during the process of reading the file, When the connection between the terminal device and the external storage device is abnormal such as the external storage device 2 is pulled out during the reading process, the terminal device 1 will not directly prompt an error, but will record the current reading position of the currently read file. And according to the identification information of the acquired file, when the network is available, continue to read the unread remaining file content from the network terminal 3, so that the file reading process will not be interrupted, make full use of the read resources, improve the system App stability and usability.

In the embodiment of the present invention, the terminal device 1 includes but not limited to computers, smart TVs, smart phones, set-top boxes, etc., and the external storage device 3 includes but not limited to SD cards, U disks, hard disks, floppy disks, optical disks, etc. , the connection channel of the network terminal 3 includes but not limited to network cable, wifi, 3G, GSM, CDMA, bluetooth, infrared, etc.

In a further implementation process, the terminal device 1 is further configured to: download the file and the identification information corresponding to the file from the network terminal 3 .

In a further implementation process, the terminal device 1 is also used to: search for the file at the network terminal 3 according to the identification information; if the file exists, perform byte-by-byte sequentially according to the current reading position Read all the bytes after the current read position of the file from the network terminal 3 while downloading.

In a further implementation process, the terminal device 1 is also used to: determine whether the terminal device 1 is connected to the network terminal 3; if not, prompt the user that it is not connected to the network terminal 3; if so, then according to the identification information The file is searched at the network terminal 3; when the file is not found, the user is prompted that the file is not found.

Compared with the disadvantages and deficiencies of the prior art, the present invention has the following advantages: in the process of reading the files on the external storage device through the terminal device, the external storage device does not exist or is unplugged during the reading process, and it is available on the network In the case of unreadable files, you can still continue to read the unfinished remaining file content through the network, so that the file reading process will not be interrupted, make full use of the read resources, and improve the stability and practicability of system applications.

The above is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent transformations made by using the contents of the description of the present invention, or directly or indirectly used in other related technical fields, are all included in the same principle. Within the scope of patent protection of the present invention.

Claims (10)

1. a kind of method that file is read from external storage equipment, it is characterised in that comprise the following steps：

Terminal device directly reads the identification information and download address of file in external storage equipment, and the identification information is used for only The one mark file, the identification information and download address are stored in terminal device；

Terminal device reads file in the external storage equipment；

When terminal device detects external storage equipment exception is connected with terminal device, current read position is recorded；

Terminal device reads the current read position of the file from network-side according to the identification information and current read position All the elements afterwards；

Wherein, the terminal device and the direct physical connection of both external storage equipments.

2. the method for file is read from external storage equipment as claimed in claim 1, it is characterised in that the terminal device Obtain in external storage equipment the identification information of file and the step of download address before also include：With external storage equipment phase Terminal device even is downloaded from network-side and preserves the file into external storage equipment, while the corresponding mark of file is believed Breath, download address are stored in terminal device.

3. the method for file is read from external storage equipment as claimed in claim 1, it is characterised in that the identification information Filename and download address at least including the file；

The terminal device reads the file and specifically included：The terminal device is byte-by-byte in order to read the file.

4. the method for file is read from external storage equipment as claimed in claim 1, it is characterised in that the terminal device It is all interior after the current read position for reading the file from network-side according to the identification information and current read position The step of appearance, specifically includes：

Terminal device searches the file according to the identification information in network-side；

The file as described in existing, then it is byte-by-byte in order to download side reading from network end edge according to the current read position All bytes after the file current read position.

5. the method for file is read from external storage equipment as claimed in claim 4, it is characterised in that the terminal device Specifically included according to the identification information the step of network-side searches the file：

Terminal device judges whether to be connected with network-side；

If it is not, then prompting user is not connected with network-side；

If so, then searching the file in network-side according to the identification information；Such as the file in the absence of as described in, then user is pointed out not Find file.

6. a kind of system that file is read from external storage equipment, it is characterised in that including terminal device, external storage equipment And network-side, the external storage equipment is connected with the terminal device, and the terminal device is connected with network-side, wherein,

The terminal device, identification information and download address for directly reading file in external storage equipment, the mark Information is used for file described in unique mark, and deposits the identification information and download address；Read the file；Detect external When storage device is connected exception with terminal device, current read position is recorded；According to the identification information and current read position, All the elements after the current read position for reading the file from network-side；

The external storage equipment, for storing the file, so that the terminal device is read；

The network-side, for providing the file and identification information corresponding with this document and download address, for it is outer The be connected terminal device of storage device is connect to download；

Wherein, the terminal device and the direct physical connection of both external storage equipments.

7. the system of file is read from external storage equipment as claimed in claim 6, it is characterised in that the terminal device It is additionally operable to：When being connected with external storage equipment, downloaded from network-side and preserve the file into external storage equipment, simultaneously The corresponding identification information of file, download address link are stored in terminal device.

8. the system of file is read from external storage equipment as claimed in claim 7, it is characterised in that the identification information Filename and download address including the file；

The terminal device is additionally operable to, byte-by-byte in order to read the file.

9. the system of file is read from external storage equipment as claimed in claim 8, it is characterised in that the terminal device It is additionally operable to：

The file is searched in network-side according to the identification information；The file as described in existing, then according to the current reading position Put, in order the byte-by-byte all bytes downloaded from network end edge after the file current read position is read on side.

10. the system of file is read from external storage equipment as claimed in claim 9, it is characterised in that the terminal is set It is standby to be additionally operable to：

Judge whether the terminal device is connected with network-side；If it is not, then prompting user is not connected with network-side；If so, then root According to the identification information file is searched in network-side；When not finding the file, then user is pointed out not find file.