Peb txhua tus tau pom cov pop-up: "example.com xav paub koj qhov chaw nyob." Yog tias koj nyem Tso cai, lub vev xaib feem ntau pinpoints koj qhov chaw nyob hauv vib nas this. Tab sis yog tias koj siv lub laptop tsis muaj GPS nti, nws yuav ua li cas thiaj paub tias koj nyob qhov twg kom raug?
HTML5 Geolocation API
Niaj hnub nimno web browsers siv tus qauv hu ua HTML5 Geolocation API. Qhov API no tsis pom koj qhov chaw nyob nws tus kheej; es, nws ua raws li ib tug tub txib. Nws nug cov cuab yeej ua haujlwm (Windows, macOS, iOS, Android) txhawm rau txheeb xyuas seb nws nyob qhov twg, thiab tom qab ntawd hla cov kev tswj hwm rov qab mus rau lub vev xaib.
Yuav Ua Li Cas Qhov Kev Ua Haujlwm Pom Koj
Koj lub cuab yeej siv kev sib xyaw ua ke los txiav txim siab nws qhov chaw, hu ua Qhov Chaw Pabcuam. Nws yuav sim cov txheej txheem kom raug ua ntej, thiab rov qab mus rau qhov tseeb tsawg dua yog tias tsim nyog:
- GPS: Yog tias koj nyob ntawm lub xov tooj smartphone sab nraum zoov, lub cuab yeej yuav siv nws lub cim GPS built-in los sib txuas lus nrog satellites. Qhov no yog qhov tseeb tshaj plaws.
- Wi-Fi Positioning System (WPS): Yog tias koj nyob hauv lub laptop, qhov no yog txoj hauv kev tshaj plaws. Koj lub computer scans rau tag nrho cov nyob ze Wi-Fi network (txawm tias koj tsis txuas nrog). Nws xa cov npe (SSIDs) thiab teeb liab lub zog ntawm cov tes hauj lwm no mus rau ib lub database (feem ntau tswj los ntawm Google lossis Apple). Vim tias cov tuam txhab no tau teeb tsa cov chaw ntawm ntau lab tus Wi-Fi routers thoob ntiaj teb, lawv tuaj yeem ua rau koj txoj hauj lwm nrog qhov tseeb txaus ntshai - feem ntau nyob hauv ob peb meters.
- Cell Tower Triangulation: Ntawm cov khoom siv mobile, OS tuaj yeem txiav txim siab koj qhov chaw nyob raws li koj qhov kev ncua deb ntawm cov xov tooj ntawm tes.
- IP Chaw Nyob: Yog tias txhua yam ua tsis tiav, lub kaw lus yuav rov qab siv koj qhov chaw nyob IP los kwv yees koj lub nroog lossis cheeb tsam.
Tsis pub twg paub qhov cuam tshuam
Vim tias qhov browser geolocation yog qhov tseeb (ua tsaug rau Wi-Fi scanning), browsers tau tsim los tsis txhob qhia cov ntaub ntawv no yam tsis muaj koj qhov kev pom zoo, xaiv qhov kev tso cai. Yog tias koj tsis lees paub lub vev xaib kev tso cai, Geolocation API yuav thaiv qhov kev thov, thiab lub xaib yuav tsum poob rov qab los kwv yees koj qhov chaw nyob ntawm koj tus IP chaw nyob.