papergirl

XHR with ETAG via localForage


License
MIT
Install
bower install papergirl

Documentation

Papergirl

Papergirl will deliver content when you make a request. She's smart enough
to let you know that you already have content in your hand by etag
so you will save your time going to remote server and be happy using local content.

                                 ┌───(304)────────────── not_mod ┐
                                 │         ┌─ insert ─┐          │ ┌─▪ sync
 request ─┬─────────┬─ send ── load ─(200)─┤          ├─ upsert ─┼─┤
          └─ cache ─┘                      ├─ update ─┘          │ └─▫ error
               ▪▪▪▪▪▪▪▪▪▪▪▪▪▪▪▪▪▪▪▪▪▪▪▪▪▪▪▪└──────────── match ──┘

Stack

Install

npm install papergirl --save

How to use

Request and watch as functional.

papergirl.watch()
    // Occur when got cached data.
    .onCache(function(data) {
        console.log(data);
    })
    // Never Cached this data before.  
    .onInsert(function(data) {
        console.log('onInsert:' + data);
    })
    // Cached exist but data is mismatch.
    .onUpdate(function(data) {
        console.log('onUpdate:' + data);
    })
    // Something wrong.
    .onError(function(error) {
        console.log(error);
    })
    .request('foo.json');

Request and watch as functional with localhost fallback.

papergirl.watch()
    // Occur when got cached data.
    .onCache(function(data) {
        console.log(data);
    })
    // Never Cached this data before.  
    .onInsert(function(data) {
        console.log('onInsert:' + data);
    })
    // Cached exist but data is mismatch.
    .onUpdate(function(data) {
        console.log('onUpdate:' + data);
    })
    // Something wrong.
    .onError(function(error) {
        console.log(error);
    })
    // Use this uri when at localhost origin.
    .local('bar.json')
    // Make remote request.
    .request('foo.json');

Request and watch every methods as functional.

papergirl.watch()
    // Cached exist.
    .onCache(function(data) {
        console.log('onCache:' + data);
    })
    // Intercept xhr request to modify headers before send.
    .onSend(function(xhr) {
        xhr.setRequestHeader('foo', 'bar');
    })
    // Intercept xhr while load
    .onLoad(function(xhr) {
        console.log(xhr);
    })
    // Never Cached this data before.  
    .onInsert(function(data) {
        console.log('onInsert:' + data);
    })
    // Cached exist but data is mismatch.
    .onUpdate(function(data) {
        console.log('onUpdate:' + data);
    })
    // Occur when insert or update cache from remote.
    .onUpsert(function(data) {
        console.log('onUpsert:' + data);
    })
    // Cache data is match with remote data.
    .onMatch(function(data) {
        console.log('match:' + data);
    })
    // Occur after response and cached is done.
    .onSync(function(data) {
        console.log('onSync:' + data);
    })
    // Something wrong.
    .onError(function(error) {
        console.log('onError : ' + error);
    })
    // Use this uri when at localhost origin.
    .local('bar.json')
    // Make remote request.
    .request('foo.json');

How to use as options and promise.

papergirl.request('foo.json', {
    // Occur when got cached data.
    'cache': function(data) {
        console.log(data);
    },
    // Intercept xhr request to modify headers before send.
    'send': function(xhr) {
        xhr.setRequestHeader('foo', 'bar');
    },
    // Intercept xhr while load
    'load': function(xhr) {
        console.log(xhr);
    },
    // Occur when never cache before and get insert from remote.
    'insert': function(data) {
        console.log('insert');
    },
    // Cached but not match from remote.
    'update': function(data) {
        console.log('update');
    },
    // Cache is upsert from remote.
    'upsert': function(data) {
        console.log('upsert');
    },
    // Cache data is match with remote data.
    'match': function(data) {
        console.log('match');
    },
    // Cache is match with remote by ETag.
    'not_mod': function(data) {
        console.log('not_mod');
    },
    // Occur after response and cached is done.
    'sync': function(data) {
        console.log('sync');
    }
}).then(function(data) {
    // Done.
    console.log(data);
}).catch(function(error) {
    // Something wrong.
    console.log(error);
});

How to develop

Run

npm run dev

Test

npm test

Deploy to git and npm

npm run deploy

Options

  • cache : Occur when got cached data.
  • send: Intercept xhr request usually to modify headers before send.
  • load: Intercept xhr while onload.
  • insert : Occur when never cache before and get insert from remote.
  • update : Cached but not match from remote.
  • upsert : Cache get insert or update from remote.
  • match : Cache data is match with remote data.
  • not_mod : Cache is match with remote by ETag.
  • sync : Occur after response and cached is done.

TODO

  • Test strategy.cacheFirst.
  • Test strategy.networkFirst.
  • Test strategy.cacheOnly.
  • Test strategy.networkOnly.
  • Test parallel requests.
  • Implement optional etag. // useIfNoneMatch
  • Implement optional last-modified. // useLastModify
  • Implement last-modified fallback.
  • Test last-modified fallback.
  • Test ready.
  • Support multiple storeName.
  • Support Cache-Control: max-age.
  • Support xhr.responseTextType = 'json'.
  • Ignore query when cache.