iOS Development--Network Programming OC Articles & (eight) file compression and decompression

File compression and decompression

I. Technical PROGRAMMES
1. Third-party framework: Ssziparchive
2. Dependent Dynamic Library: Libz.dylib

Two, compression 1
1. The first method
/**
ZipFile: The final path of the resulting zip file
Directory: Compressed folder path that needs to be made
*/
[Ssziparchive Createzipfileatpath:zipfile withcontentsofdirectory:directory];

2. The first method
/**
ZipFile: The final path of the resulting zip file
Files: This is an array that contains the path to the files that need to be compressed
Files = @[@ "/users/apple/destop/1.png", @ "/users/apple/destop/3.txt"]
*/
[Ssziparchive Createzipfileatpath:zipfile withfilesatpaths:files];

Three, decompression
/**
ZipFile: The path of the zip file that needs to be unzipped
Dest: Where to unzip?
*/
[Ssziparchive Unzipfileatpath:zipfile todestination:dest];

One: File compression

1-(NSString *) MIMEType: (Nsurl *) URL2 {3     //1. Create a request4Nsurlrequest *request =[Nsurlrequest Requestwithurl:url];5     //2. Send request (return response)6Nsurlresponse *response =Nil;7[Nsurlconnection sendsynchronousrequest:request returningresponse:&response Error:nil];8     //3. Get MimeType9     returnResponse. MIMEType;Ten } One  A- (void) Touchesbegan: (Nsset *) touches withevent: (Uievent *)Event - { -NSString *caches =[Nssearchpathfordirectoriesindomains (Nscachesdirectory, Nsuserdomainmask, YES) lastobject]; the  -     //0. Get the folder you want to compress -NSString *images = [caches stringbyappendingpathcomponent:@"Images"]; -      +     //1. Create a ZIP file (compress) -NSString *zipfile = [caches stringbyappendingpathcomponent:@"Images.zip"]; +  ABOOL result =[ssziparchive createzipfileatpath:zipfile withcontentsofdirectory:images]; at     if(Result) { -NSString *mimetype =[self mimetype:[nsurl fileurlwithpath:zipfile]]; -NSData *data =[NSData Datawithcontentsoffile:zipfile]; -[Self Upload:@"Images.zip"Mimetype:mimetype Filedata:dataparams:@{@"username":@"Lisi"}]; -     } - } in  -  to- (void) Upload: (NSString *) filename mimeType: (NSString *) MimeType fileData: (NSData *) fileDataparams:(Nsdictionary *)params + { -     //1. Request Path theNsurl *url = [Nsurl urlwithstring:@"Http://192.168.15.172:8080/MJServer/upload"]; *      $     //2. Create a POST requestPanax NotoginsengNsmutableurlrequest *request =[Nsmutableurlrequest Requestwithurl:url]; -Request. HttpMethod =@"POST"; the      +     //3. Set the request body ANsmutabledata *body =[Nsmutabledata data]; the      +     //3.1. File Parameters -[Body Appenddata:icocosencode (@"--")]; $ [Body Appenddata:icocosencode (icocosfileboundary)]; $ [Body Appenddata:icocosencode (Icocosnewlien)]; -      -NSString *disposition = [NSString stringWithFormat:@"content-disposition:form-data; name=\"File\"; filename=\ "%@\"", filename]; the [Body appenddata:icocosencode (disposition)]; - [Body Appenddata:icocosencode (Icocosnewlien)];Wuyi      theNSString *type = [NSString stringWithFormat:@"Content-type:%@", MimeType]; - [Body Appenddata:icocosencode (type)]; Wu [Body Appenddata:icocosencode (Icocosnewlien)]; -      About [Body Appenddata:icocosencode (Icocosnewlien)]; $ [Body appenddata:filedata]; - [Body Appenddata:icocosencode (Icocosnewlien)]; -      -     //3.2. Non-file parameters A[paramsenumeratekeysandobjectsusingblock:^ (IDKeyIDobj, BOOL *stop) { +[Body Appenddata:icocosencode (@"--")]; the [Body Appenddata:icocosencode (icocosfileboundary)]; - [Body Appenddata:icocosencode (Icocosnewlien)]; $          theNSString *disposition = [NSString stringWithFormat:@"content-disposition:form-data; name=\"%@\"", key]; the [Body appenddata:icocosencode (disposition)]; the [Body Appenddata:icocosencode (Icocosnewlien)]; the          - [Body Appenddata:icocosencode (Icocosnewlien)]; in [Body appenddata:icocosencode ([obj description]); the [Body Appenddata:icocosencode (Icocosnewlien)]; the     }]; About      the     //3.3. End tag the[Body Appenddata:icocosencode (@"--")]; the [Body Appenddata:icocosencode (icocosfileboundary)]; +[Body Appenddata:icocosencode (@"--")]; - [Body Appenddata:icocosencode (Icocosnewlien)]; the     BayiRequest. Httpbody =body; the      the     //4. Set the request header (tell the server this time to you is the file data, tell the server is now sending a file upload request) -NSString *contenttype = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", icocosfileboundary]; -[Request Setvalue:contenttype Forhttpheaderfield:@"Content-type"]; the      the     //5. Sending the request the[Nsurlconnection sendasynchronousrequest:request queue:[nsoperationqueue Mainqueue] completionHandler:^ ( Nsurlresponse *response, NSData *data, Nserror *connectionerror) { theNsdictionary *dict =[nsjsonserialization jsonobjectwithdata:data options:nsjsonreadingmutableleaves Error:nil]; -NSLog (@"%@", dict); the     }]; the}

Two: File decompression

1- (void) Touchesbegan: (Nsset *) touches withevent: (Uievent *)Event2 {3Nsurl *url = [Nsurl urlwithstring:@"Http://localhost:8080/MJServer/resources/images.zip"];4Nsurlsessiondownloadtask *task = [[nsurlsession sharedsession] Downloadtaskwithurl:url completionHandler:^ (NSURL * Location, Nsurlresponse *response, Nserror *error) {5NSString *caches =[Nssearchpathfordirectoriesindomains (Nscachesdirectory, Nsuserdomainmask, YES) lastobject];6 [ssziparchive UnzipFileAtPath:location.path todestination:caches];7     }];8 [Task resume];9}

iOS Development--Network Programming OC Chapter & (eight) file compression and decompression