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package api
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"log"
"net/http"
"git.sigsum.org/sigsum-lib-go/pkg/requests"
"git.sigsum.org/sigsum-lib-go/pkg/types"
)
type NetworkClient struct {
http.Client
LogURL string
}
func NewNetworkClient(httpClient http.Client, logURL string) *NetworkClient {
return &NetworkClient{
Client: httpClient,
LogURL: logURL,
}
}
func (c *NetworkClient) GetToCosignTreeHead() (*types.SignedTreeHead, error) {
return nil, fmt.Errorf("TODO")
}
func (c *NetworkClient) GetCosignedTreeHead() (*types.CosignedTreeHead, error) {
rsp, err := c.get(types.EndpointGetTreeHeadCosigned.Path(c.LogURL))
if err != nil {
return nil, fmt.Errorf("client: HTTP %d: %s", rsp.StatusCode, errorMessage(rsp.Body))
}
defer rsp.Body.Close()
if rsp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("client: HTTP %d: %s", rsp.StatusCode, errorMessage(rsp.Body))
}
var cth types.CosignedTreeHead
if err := cth.FromASCII(rsp.Body); err != nil {
return nil, fmt.Errorf("client: HTTP %d: %s", rsp.StatusCode, errorMessage(rsp.Body))
}
return &cth, nil
}
func (c *NetworkClient) GetInclusionProof(treeSize uint64, leafHash *types.Hash) (*types.InclusionProof, error) {
data := requests.InclusionProof{
TreeSize: treeSize,
LeafHash: *leafHash,
}
buf := bytes.NewBuffer(nil)
if err := data.ToASCII(buf); err != nil {
return nil, fmt.Errorf("client: invalid request data: %v", err)
}
rsp, err := c.post(types.EndpointGetInclusionProof.Path(c.LogURL), buf)
if err != nil {
return nil, fmt.Errorf("client: invalid proof request: %v", err)
}
defer rsp.Body.Close()
if rsp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("client: HTTP %d: %s", rsp.StatusCode, errorMessage(rsp.Body))
}
var proof types.InclusionProof
if err := proof.FromASCII(rsp.Body, treeSize); err != nil {
return nil, fmt.Errorf("client: failed parsing response: %v", err)
}
return &proof, nil
}
func (c *NetworkClient) GetConsistencyProof(oldSize, newSize uint64) (*types.ConsistencyProof, error) {
return nil, fmt.Errorf("TODO")
}
func (c *NetworkClient) GetLeaves(startSize, endSize uint64) (*types.Leaves, error) {
return nil, fmt.Errorf("TODO")
}
func (c *NetworkClient) AddLeaf(leaf *requests.Leaf) error {
buf := bytes.NewBuffer(nil)
if err := leaf.ToASCII(buf); err != nil {
return fmt.Errorf("client: invalid request data: %v", err)
}
rsp, err := c.post(types.EndpointAddLeaf.Path(c.LogURL), buf)
if err != nil {
return fmt.Errorf("client: HTTP %d: %s", rsp.StatusCode, errorMessage(rsp.Body))
}
defer rsp.Body.Close()
if rsp.StatusCode != http.StatusOK {
return fmt.Errorf("client: HTTP %d: %s", rsp.StatusCode, errorMessage(rsp.Body))
}
return nil
}
func (c *NetworkClient) AddCosignature(*requests.Cosignature) error {
return fmt.Errorf("TODO")
}
func (c *NetworkClient) get(url string) (*http.Response, error) {
log.Printf("GET %s", url)
return c.Get(url)
}
func (c *NetworkClient) post(url string, buf *bytes.Buffer) (*http.Response, error) {
req, err := http.NewRequest("POST", url, buf)
if err != nil {
return nil, fmt.Errorf("client: invalid leaf request: %v", err)
}
log.Printf("POST %s", url)
return c.Do(req)
}
func errorMessage(r io.Reader) string {
b, _ := ioutil.ReadAll(r)
return string(b)
// TODO: the below doesn't work because log error messages are malformed
//msg := struct {
// Message string `ascii:"Error"`
//}{}
//if err := ascii.StdEncoding.Deserialize(r, &msg); err != nil {
// return fmt.Sprintf("malformed error message: %v", err)
//}
//return msg.Message
}
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