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Swarm MRUs: Adaptive frequency / Predictable lookups / API simplification (#17559)

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* swarm/storage/mru: Adaptive Frequency

swarm/storage/mru/lookup: fixed getBaseTime
Added NewEpoch constructor

swarm/api/client: better error handling in GetResource()


swarm/storage/mru: Renamed structures.
Renamed ResourceMetadata to ResourceID. 
Renamed ResourceID.Name to ResourceID.Topic

swarm/storage/mru: Added binarySerializer interface and test tools

swarm/storage/mru/lookup: Changed base time to time and + marshallers

swarm/storage/mru:  Added ResourceID (former resourceMetadata)

swarm/storage/mru: Added ResourceViewId and serialization tests

swarm/storage/mru/lookup: fixed epoch unmarshaller. Added Epoch Equals

swarm/storage/mru: Fixes as per review comments

cmd/swarm: reworded resource create/update help text regarding topic

swarm/storage/mru: Added UpdateLookup and serializer tests

swarm/storage/mru: Added UpdateHeader, serializers and tests

swarm/storage/mru: changed UpdateAddr / epoch to Base()

swarm/storage/mru: Added resourceUpdate serializer and tests

swarm/storage/mru: Added SignedResourceUpdate tests and serializers

swarm/storage/mru/lookup: fixed GetFirstEpoch bug

swarm/storage/mru: refactor, comments, cleanup

Also added tests for Topic
swarm/storage/mru: handler tests pass

swarm/storage/mru: all resource package tests pass

swarm/storage/mru: resource test pass after adding
timestamp checking support

swarm/storage/mru: Added JSON serializers to ResourceIDView structures

swarm/storage/mru: Sever, client, API test pass

swarm/storage/mru: server test pass

swarm/storage/mru: Added topic length check

swarm/storage/mru: removed some literals,
improved "previous lookup" test case

swarm/storage/mru: some fixes and comments as per review

swarm/storage/mru: first working version without metadata chunk

swarm/storage/mru: Various fixes as per review

swarm/storage/mru: client test pass

swarm/storage/mru: resource query strings and manifest-less queries


swarm/storage/mru: simplify naming

swarm/storage/mru: first autofreq working version



swarm/storage/mru: renamed ToValues to AppendValues

swarm/resource/mru: Added ToValues / FromValues for URL query strings

swarm/storage/mru: Changed POST resource to work with query strings.
No more JSON.

swarm/storage/mru: removed resourceid

swarm/storage/mru: Opened up structures

swarm/storage/mru: Merged Request and SignedResourceUpdate

swarm/storage/mru: removed initial data from CLI resource create

swarm/storage/mru: Refactor Topic as a direct fixed-length array

swarm/storage/mru/lookup: Comprehensive GetNextLevel tests

swarm/storage/mru: Added comments

Added length checks in Topic
swarm/storage/mru: fixes in tests and some code comments

swarm/storage/mru/lookup: new optimized lookup algorithm

swarm/api: moved getResourceView to api out of server

swarm/storage/mru: Lookup algorithm working

swarm/storage/mru: comments and renamed NewLookupParams

Deleted commented code


swarm/storage/mru/lookup: renamed Epoch.LaterThan to After

swarm/storage/mru/lookup: Comments and tidying naming



swarm/storage/mru: fix lookup algorithm

swarm/storage/mru: exposed lookup hint
removed updateheader

swarm/storage/mru/lookup: changed GetNextEpoch for initial values

swarm/storage/mru: resource tests pass

swarm/storage/mru: valueSerializer interface and tests



swarm/storage/mru/lookup: Comments, improvements, fixes, more tests

swarm/storage/mru: renamed UpdateLookup to ID, LookupParams to Query

swarm/storage/mru: renamed query receiver var



swarm/cmd: MRU CLI tests

* cmd/swarm: remove rogue fmt

* swarm/storage/mru: Add version / header for future use

* swarm/storage/mru: Fixes/comments as per review

cmd/swarm: remove rogue fmt

swarm/storage/mru: Add version / header for future use-

* swarm/storage/mru: fix linter errors

* cmd/swarm: Speeded up TestCLIResourceUpdate
This commit is contained in:
Javier Peletier
2018-09-28 12:07:17 +02:00
committed by Martin Holst Swende
parent 0da3b17a11
commit 2c110c81ee
44 changed files with 3337 additions and 3022 deletions
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66
swarm/api/client/client.go
View File

@ -28,6 +28,7 @@ import (
"mime/multipart"
"net/http"
"net/textproto"
"net/url"
"os"
"path/filepath"
"regexp"
@ -595,13 +596,16 @@ func (c *Client) MultipartUpload(hash string, uploader Uploader) (string, error)
return string(data), nil
}
// ErrNoResourceUpdatesFound is returned when Swarm cannot find updates of the given resource
var ErrNoResourceUpdatesFound = errors.New("No updates found for this resource")
// CreateResource creates a Mutable Resource with the given name and frequency, initializing it with the provided
// data. Data is interpreted as multihash or not depending on the multihash parameter.
// startTime=0 means "now"
// Returns the resulting Mutable Resource manifest address that you can use to include in an ENS Resolver (setContent)
// or reference future updates (Client.UpdateResource)
func (c *Client) CreateResource(request *mru.Request) (string, error) {
responseStream, err := c.updateResource(request)
responseStream, err := c.updateResource(request, true)
if err != nil {
return "", err
}
@ -621,17 +625,24 @@ func (c *Client) CreateResource(request *mru.Request) (string, error) {
// UpdateResource allows you to set a new version of your content
func (c *Client) UpdateResource(request *mru.Request) error {
_, err := c.updateResource(request)
_, err := c.updateResource(request, false)
return err
}
func (c *Client) updateResource(request *mru.Request) (io.ReadCloser, error) {
body, err := request.MarshalJSON()
func (c *Client) updateResource(request *mru.Request, createManifest bool) (io.ReadCloser, error) {
URL, err := url.Parse(c.Gateway)
if err != nil {
return nil, err
}
URL.Path = "/bzz-resource:/"
values := URL.Query()
body := request.AppendValues(values)
if createManifest {
values.Set("manifest", "1")
}
URL.RawQuery = values.Encode()
req, err := http.NewRequest("POST", c.Gateway+"/bzz-resource:/", bytes.NewBuffer(body))
req, err := http.NewRequest("POST", URL.String(), bytes.NewBuffer(body))
if err != nil {
return nil, err
}
@ -642,28 +653,61 @@ func (c *Client) updateResource(request *mru.Request) (io.ReadCloser, error) {
}
return res.Body, nil
}
// GetResource returns a byte stream with the raw content of the resource
// manifestAddressOrDomain is the address you obtained in CreateResource or an ENS domain whose Resolver
// points to that address
func (c *Client) GetResource(manifestAddressOrDomain string) (io.ReadCloser, error) {
func (c *Client) GetResource(query *mru.Query, manifestAddressOrDomain string) (io.ReadCloser, error) {
return c.getResource(query, manifestAddressOrDomain, false)
}
res, err := http.Get(c.Gateway + "/bzz-resource:/" + manifestAddressOrDomain)
// getResource returns a byte stream with the raw content of the resource
// manifestAddressOrDomain is the address you obtained in CreateResource or an ENS domain whose Resolver
// points to that address
// meta set to true will instruct the node return resource metainformation instead
func (c *Client) getResource(query *mru.Query, manifestAddressOrDomain string, meta bool) (io.ReadCloser, error) {
URL, err := url.Parse(c.Gateway)
if err != nil {
return nil, err
}
URL.Path = "/bzz-resource:/" + manifestAddressOrDomain
values := URL.Query()
if query != nil {
query.AppendValues(values) //adds query parameters
}
if meta {
values.Set("meta", "1")
}
URL.RawQuery = values.Encode()
res, err := http.Get(URL.String())
if err != nil {
return nil, err
}
return res.Body, nil
if res.StatusCode != http.StatusOK {
if res.StatusCode == http.StatusNotFound {
return nil, ErrNoResourceUpdatesFound
}
errorMessageBytes, err := ioutil.ReadAll(res.Body)
var errorMessage string
if err != nil {
errorMessage = "cannot retrieve error message: " + err.Error()
} else {
errorMessage = string(errorMessageBytes)
}
return nil, fmt.Errorf("Error retrieving resource: %s", errorMessage)
}
return res.Body, nil
}
// GetResourceMetadata returns a structure that describes the Mutable Resource
// manifestAddressOrDomain is the address you obtained in CreateResource or an ENS domain whose Resolver
// points to that address
func (c *Client) GetResourceMetadata(manifestAddressOrDomain string) (*mru.Request, error) {
func (c *Client) GetResourceMetadata(query *mru.Query, manifestAddressOrDomain string) (*mru.Request, error) {
responseStream, err := c.GetResource(manifestAddressOrDomain + "/meta")
responseStream, err := c.getResource(query, manifestAddressOrDomain, true)
if err != nil {
return nil, err
}