Method and system for downloading and playing media file, client, server, and storage medium

A method for downloading a media file, comprising:

• at a server having one or more processors and memory storing program modules to be executed by the one or more processors:
• receiving a request for acquiring the media file from a client device, the request including current network connection information of the client device;
• after receiving the request for acquiring the media file, determining whether a file size of the media file is greater than a preset value;
• in accordance with a determination that the file size of the media file is greater than the preset value, dynamically dividing the media file into an ordered list of fragments according to the current network connection information of the client device, storing the fragments in the memory, forming download list information of the fragments, and further sending the download list information of the fragments to the client device;
• after sending the download list information of the fragments, receiving a request for acquiring the fragments of the media file from the client device;
• and
• in response to the request for acquiring the fragments of the media file, returning the fragments of the media file to the client device sequentially according to the order of the fragments in the download list information,
• wherein the client device is configured to play the fragments of the media file returned by the server in accordance with the order of the fragments according to a received instruction of playing the media file, and after receiving the instruction of playing the media file, identify a next fragment before playback of a currently played fragment is finished and determining whether the next fragment is complete;
• in accordance with a determination that the next fragment is complete, play the next fragment when the playback of the currently played fragment is finished;
• and
• in accordance with a determination that the next fragment is incomplete, skip check information of the next fragment and only reading media content of the next fragment when reading the next fragment, and playing the media content of the next fragment when the playback of the currently played fragment is finished.

A client device, comprising:

• one or more processors;
• memory;
• and
• a plurality of program modules, wherein the plurality of program modules, when executed by the one or more processors, cause the client device to perform predefined operations, the plurality of program modules further including:
• a file acquiring module, configured to send a request for acquiring a media file to a server, the request including current network connection information of the client device, wherein the server is configured to determine whether a file size of the media file is greater than a preset value, and dynamically divide the media file into an ordered list of fragments in accordance with the current network connection information of the client device when the file size of the media file is greater than the preset value, and receive download list information from the server, wherein the download list information identifies the ordered list of fragments;
• a fragment acquiring module, configured to after receiving the download list information from the server, initiate a request for acquiring the fragments of the media file to the server according to the order of the fragments in the download list information, and acquire the fragments of the media file returned by the server;
• and
• a playback module, configured to play the fragments of the media file returned by the server in accordance with the order of the fragments according to a received instruction of playing the media file and after receiving the instruction of playing the media file, identify a next fragment before playback of a currently played fragment is finished and determining whether the next fragment is complete;
• in accordance with a determination that the next fragment is complete, playing the next fragment when the playback of the currently played fragment is finished;
• and
• in accordance with a determination that the next fragment is incomplete, skipping check information of the next fragment and only reading media content of the next fragment when reading the next fragment, and playing the media content of the next fragment when the playback of the currently played fragment is finished.