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I-Semalt ichaza ukuba yiziphi iikhono ozifunayo ukuze ufunde i-Web Scraping

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Ukuba ufuna akunakwenzeka ukuba uqokelele idatha ngokukhangela kwiGoogle. Ngamanye amaxesha kufuneka sisebenzise abancinci bee-web kunye ne-data scrapers ukuze benze iiprojekthi zethu zenzeke, ngamanye amaxesha kufuneka sihlakulele izakhono ezisisiseko. Kuyinyani ukuba iinjine zokukhangela zingakunceda ufumane oko ufuna, kodwa kufuneka uphuhlise izakhono ezilandelayo ukuze uphumelele.

1. Ikhono lokufunda ifayile ye robots.txt

Kufuneka ukwazi ukufunda nokuhlela iifayile zeerobhothi.txt ngokufanelekileyo. Le fayili isetyenziselwe ukunciphisa abaqheqhi ukuba bangabetha indawo yakho rhoqo. Ngexesha elifanayo, kukunceda ugcine umgangatho weenkcukacha zakho kunye nokuphucula isantya sewebhusayithi yakho kwiindwendwe zabantu. Yingakho kufuneka ufunde indlela yokuhlela ifayile yeerobhothi.txt. Xa ulungisile le fayile ngokufanelekileyo, uya kukwazi ukulahla iibhokhwe ezimbi ezingahambisani nemigaqo nemigaqo yeenjini zokukhangela. Ukongezelela, unokujolisa kumaphepha ewebhu ahlukeneyo ngexesha elifanayo kwaye unokwenza okanye ukhiphe idatha efunwayo ngokufanelekileyo.

2..Ukusekwa kweziseko zedatha

Kubaluleke kakhulu ukusekela isiseko seziseko njengoko kuza kuvula idatha yekhwalithi kwi-website yonke. Ngokomzekelo, kufuneka ufunde i-SQL, i-PHP kunye nezinye iilwimi ezifanayo njengoko zikunceda ukugcina izibonelelo zedatha yakho ngendlela engcono. Ukubonelela nge-SQL kunye nokusekwa kweziseko zophuhliso zedatha kunokukunceda ukuba ube ngumhlaziyi-self-servist, ukufumana idatha echanekileyo nechanekileyo kakuhle kwiminithi embalwa.

3. Iingcamango ezisisiseko ze-HTML, i-CSS kunye neJavaScript

Kubalulekile ukufunda i-HTML, i-JavaScript kunye ne-CSS ukuba ufuna ukuyifaka yonke iwebhusayithi ngaphandle kokunciphisa umgangatho. Ukuba uzibuza indlela abaprogram basebenze ngayo kwaye akenzanga nantoni na ukukhangela umxholo wakho wewebhu, ixesha lokuba ufunde ezinye iilwimi zenkqubo kunye nokuphuhlisa izakhono ezimbalwa. Kumntu ongeke akhonze ngaphambili, iigama ze-HTML, i-JavaScript kunye ne-CSS iya kuba yintsha. Unokwenza uhlalutye ngokuphindaphindiweyo idatha kude kubekho iziphumo ezingamkelekanga. Yinkqubo eyinkimbinkimbi, kodwa xa ufumana ulwazi lwezi zinto, uya kukwazi ukukhangela amanqaku amaninzi ewebhu njengoko ufuna ngaphandle kweyiphi imfuno ithuluzi lokucima idatha . I-HTML kunye ne-CSS ayilona iilwimi zokusetyenziswa kweelwimi, ngoko kulula ukuba zifunde, kwaye unokuzibamba ezinsukwini ezimbalwa.

4. Ikhono lokubhala nokulinganisa i-bots

Kufuneka ukwazi ukwahlula i-bots ezilungileyo kunye neendawo ezimbi. I-bots ezilungileyo zikunceda i-website yakho kwisiphumo se-injini yokukhangela, ikunike idatha ehlelwe kakuhle kunye nephezulu. Ngakolunye uhlangothi, iibhokhwe ezimbi ziyingozi kwindawo yakho kwaye aziyi kukufumana idatha echanekileyo. Akudingeki nje ukuba uhlukanise zombini i-bots ezilungileyo kunye neendawo ezimbi kodwa kufuneka ubhale kwaye ulinganise i-bots. Kufuneka ukhumbule ukuba i-bots yinyathelo elilandelayo ekuveleni kwekhompyutha kunye nokusebenzisana kwabantu. Kuthetha ukuba uyazi malunga nebhobho kwaye ubhale njalo, eziphakamileyo ziya kuba ngamathuba akho ukuba ahlalutye idatha yekhwalithi kwaye asebenzise inxaxheba kwishishini lakho.

December 14, 2017
I-Semalt ichaza ukuba yiziphi iikhono ozifunayo ukuze ufunde i-Web Scraping
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