Golang aws.Signer类(方法)实例源码

func (self *Service) DescribeInstances(id *aws.Signer, filter http.Values, ic chan Instance) (err os.Error) {
	if filter == nil {
		filter = http.Values{}
	}
	filter.Set("Action", "DescribeInstances")
	req := aws.NewRequest(self.URL, "GET", nil, filter)
	err = id.SignRequestV2(req, aws.Canonicalize, DEFAULT_VERSION, 15)
	if err != nil {
		return
	}
	resp, err := self.conn.Request(req)
	if err == nil {
		defer resp.Body.Close()
		xresp := describeInstancesResponse{}
		err := xml.Unmarshal(resp.Body, &xresp)
		if err == nil {
			log.Printf("XRESP == %+v", xresp)
		} else {
			log.Printf("XERR == %+v", err)
		}
		ob, _ := http.DumpResponse(resp, true)
		os.Stdout.Write(ob)
	}

	return
}

// Users note: amazon will only return an error if the request is bad,
// thus an error will not be raised when deleting a non-existent LB.
func (self *Service) DeleteLoadBalancer(id *aws.Signer, name string) (err os.Error) {
	parms := http.Values{}
	parms.Set("Action", "DeleteLoadBalancer")
	parms.Set("LoadBalancerName", name)
	req := aws.NewRequest(self.URL, "GET", nil, parms)
	err = id.SignRequestV2(req, aws.Canonicalize, DEFAULT_VERSION, 0)
	if err != nil {
		return
	}
	resp, err := self.conn.Request(req)
	if err != nil {
		return
	}
	defer resp.Body.Close()
	if resp.StatusCode != 200 {
		err = aws.CodeToError(resp.StatusCode)
	}
	qr := LoadBalancerQueryResult{}
	err = xml.Unmarshal(resp.Body, &qr)
	if err == nil {
		if qr.ErrorCode != "" {
			err = os.NewError(qr.ErrorCode)
		}
	}
	return
}

func (self *Domain) GetAttribute(s *aws.Signer, item string, attrs AttributeList, consist bool) (a []Attribute, err os.Error) {
	var resp *http.Response

	vl := attrs.Values(ATTRIBUTE_LIST)

	vl.Set("Action", "GetAttributes")
	vl.Set("DomainName", self.Name)
	vl.Set("ItemName", item)

	if consist {
		vl.Set("ConsistentRead", "true")
	}

	req := aws.NewRequest(self.URL, "GET", nil, vl)
	err = s.SignRequestV2(req, aws.Canonicalize, DEFAULT_API_VERSION, 0)
	if err == nil {
		resp, err = self.conn.Request(req)
	}
	if err == nil {
		defer resp.Body.Close()
		err = aws.CodeToError(resp.StatusCode)
	}
	if err == nil {
		var response getattributesresponse
		ob, _ := http.DumpResponse(resp, true)
		os.Stdout.Write(ob)
		err = xml.Unmarshal(resp.Body, &response)
		if err == nil {
			a = response.Attributes
		}
	}
	return
}

func (self *Service) ListQueues(id *aws.Signer, prefix string) (mq []string, err os.Error) {
	var resp *http.Response
	parms := http.Values{}
	parms.Set("Action", "ListQueues")
	if prefix != "" {
		parms.Set("QueueNamePrefix", prefix)
	}

	req := aws.NewRequest(self.URL, "GET", nil, parms)
	err = id.SignRequestV2(req, aws.Canonicalize, DEFAULT_VERSION, 15)
	resp, err = self.conn.Request(req)
	if err == nil {
		defer resp.Body.Close()
		xresp := listQueuesResponse{}
		if resp.StatusCode == http.StatusOK {
			err = xml.Unmarshal(resp.Body, &xresp)
		} else {
			err = os.NewError("Unexpected response code")
		}
		if err == nil {
			mq = xresp.QueueURL
		}

	}
	return
}

// Note: 0 is a valid timeout!!
func (self *Queue) Peek(id *aws.Signer, vt int) (body []byte, msgid string, err os.Error) {
	var resp *http.Response
	parms := http.Values{}
	parms.Set("Action", "ReceiveMessage")
	if vt >= 0 {
		parms.Set("VisibilityTimeout", strconv.Itoa(vt))
	}
	req := aws.NewRequest(self.URL, "GET", nil, parms)
	err = id.SignRequestV2(req, aws.Canonicalize, DEFAULT_VERSION, 15)
	if err == nil {
		resp, err = self.conn.Request(req)
		if err == nil {
			defer resp.Body.Close()
		}
		if err == nil && resp.StatusCode != http.StatusOK {
			err = os.NewError("Unexpected response")
		}
		if err == nil {
			msg := message{}
			err = xml.Unmarshal(resp.Body, &msg)
			if err == nil {
				body, msgid = msg.Body, msg.ReceiptHandle
			}
		}
	}
	return
}

// Create a queue, returning the Queue object.
func (self *Service) CreateQueue(id *aws.Signer, name string, dvtimeout int) (mq *Queue, err os.Error) {
	var resp *http.Response
	parms := http.Values{}
	parms.Set("Action", "CreateQueue")
	parms.Set("QueueName", name)
	parms.Set("DefaultVisibilityTimeout", strconv.Itoa(dvtimeout))

	req := aws.NewRequest(self.URL, "GET", nil, parms)
	err = id.SignRequestV2(req, aws.Canonicalize, DEFAULT_VERSION, 15)
	if err == nil {
		resp, err = self.conn.Request(req)
		if err == nil {
			defer resp.Body.Close()
			if resp.StatusCode == http.StatusOK {
				xmlresp := createQueueResponse{}
				err = xml.Unmarshal(resp.Body, &xmlresp)
				if err == nil {
					var qrl *http.URL
					qrl, err = http.ParseURL(xmlresp.QueueURL)
					if err == nil {
						mq = NewQueue(qrl)
					}
				}
			} else {
				err = os.NewError("Unexpected response")
			}
		}
	}

	return
}

// Performs a HEAD request on the bucket and returns the response object.
// The body is CLOSED, and it is an error to try and read from it.
func (self *Bucket) HeadKey(id *aws.Signer, key string) (resp *http.Response, err os.Error) {
	hreq := aws.NewRequest(self.key_url(key), "HEAD", nil, nil)
	err = id.SignRequestV1(hreq, aws.CanonicalizeS3, 15)
	if err == nil {
		resp, err = self.conn.Request(hreq)
	}
	if err == nil {
		resp.Body.Close()
		err = aws.CodeToError(resp.StatusCode)
	}
	return
}

func (self *Bucket) PutKeyBytes(id *aws.Signer, key string, buff []byte, hdr http.Header) (err os.Error) {
	var resp *http.Response
	hreq := aws.NewRequest(self.key_url(key), "PUT", hdr, nil)
	hreq.ContentLength = int64(len(buff))
	hreq.Body = ioutil.NopCloser(bytes.NewBuffer(buff))
	err = id.SignRequestV1(hreq, aws.CanonicalizeS3, 15)
	if err == nil {
		resp, err = self.conn.Request(hreq)
		if err == nil {
			defer resp.Body.Close()
			err = aws.CodeToError(resp.StatusCode)
		}
	}
	return
}

// Note: 0 is a valid timeout!!
func (self *Queue) Delete(id *aws.Signer, mid string) (err os.Error) {
	var resp *http.Response
	parms := http.Values{}
	parms.Set("Action", "DeleteMessage")
	parms.Set("ReceiptHandle", mid)
	req := aws.NewRequest(self.URL, "GET", nil, parms)
	err = id.SignRequestV2(req, aws.Canonicalize, DEFAULT_VERSION, 15)
	if err == nil {
		resp, err = self.conn.Request(req)
		if err == nil {
			defer resp.Body.Close()
		}
		if resp.StatusCode != http.StatusOK {
			err = os.NewError("Unexpected response")
		}
	}
	return
}

func (self *Queue) Push(id *aws.Signer, body []byte) (err os.Error) {
	var resp *http.Response
	parms := http.Values{}
	parms.Set("Action", "SendMessage")
	parms.Set("MessageBody", string(body))
	req := aws.NewRequest(self.URL, "GET", nil, parms)
	err = id.SignRequestV2(req, aws.Canonicalize, DEFAULT_VERSION, 15)
	if err == nil {
		resp, err = self.conn.Request(req)
		if err == nil {
			defer resp.Body.Close()
			if resp.StatusCode != http.StatusOK {
				err = os.NewError("Unexpected response")
			}
		}
	}
	return
}

func (self *Domain) Select(id *aws.Signer, what, where string, consist bool, items chan<- Item) (err os.Error) {
	var resp *http.Response

	vl := http.Values{}

	vl.Set("Action", "Select")
	if where != "" {
		where = " where " + where
	}
	vl.Set("SelectExpression", fmt.Sprintf("select %s from %s%s", what, self.Name, where))

	if consist {
		vl.Set("ConsistentRead", "true")
	}
	done := false
	nextToken := ""
	for err == nil && !done {
		vl.Del("NextToken")
		if nextToken != "" {
			vl.Set("NextToken", nextToken)
		}
		req := aws.NewRequest(self.URL, "GET", nil, vl)
		err = id.SignRequestV2(req, aws.Canonicalize, DEFAULT_API_VERSION, 0)
		if err == nil {
			resp, err = self.conn.Request(req)
		}
		if err == nil {
			ob, _ := http.DumpResponse(resp, true)
			os.Stdout.Write(ob)
			xresp := selectresponse{}
			err = xml.Unmarshal(resp.Body, &xresp)
			if err == nil {
				fmt.Printf("XML == %+v", xresp)
				for i := range xresp.Items {
					items <- xresp.Items[i]
				}
				nextToken = xresp.NextToken
				done = (nextToken == "")
			}
			resp.Body.Close()
		}
	}
	return
}

// NB: Length is required as we do not buffer the reader
// NB(2): We do NOT close your reader (hence the io.Reader),
// we wrap it with a NopCloser.
func (self *Bucket) PutKeyReader(id *aws.Signer, key string, r io.Reader, l int64, hdr http.Header) (err os.Error) {
	var resp *http.Response
	hreq := aws.NewRequest(self.key_url(key), "PUT", hdr, nil)
	hreq.ContentLength = l
	hreq.Body = ioutil.NopCloser(io.LimitReader(r, l))
	err = id.SignRequestV1(hreq, aws.CanonicalizeS3, 15)
	if err == nil {
		resp, err = self.conn.Request(hreq)
		if err == nil {
			defer resp.Body.Close()
			err = aws.CodeToError(resp.StatusCode)
		}
		if err == aws.ErrorUnexpectedResponse {
			ob, _ := http.DumpResponse(resp, true)
			os.Stdout.Write(ob)
		}
	}
	return
}

// Deletes the named key from the bucket.  To delete a bucket, see *Service.DeleteBucket()
func (self *Bucket) Delete(id *aws.Signer, key string) (err os.Error) {
	var resp *http.Response
	if key == "" {
		return os.NewError("Key cannot be empty!")
	}
	hreq := aws.NewRequest(self.key_url(key), "DELETE", nil, nil)
	err = id.SignRequestV1(hreq, aws.CanonicalizeS3, 15)
	if err == nil {
		resp, err = self.conn.Request(hreq)
	}
	if err == nil {
		defer resp.Body.Close()
		if resp.StatusCode != http.StatusNoContent {
			err = aws.CodeToError(resp.StatusCode)
		}
	}

	return
}

// Walks a bucket and writes the resulting strings to the channel.
// * There is currently NO (correct) way to abort a running walk.
func (self *Bucket) ListKeys(id *aws.Signer,
	prefix, delim, marker string, out chan<- string) (err os.Error) {
	var done bool
	var resp *http.Response
	var last string
	form := http.Values{"prefix": []string{prefix},
		"delimeter": []string{delim},
		"marker":    []string{marker}}
	for err == nil && !done {
		result := listBucketResult{}
		result.Prefix = prefix
		result.Marker = marker
		if last != "" {
			form.Set("marker", last)
		}

		hreq := aws.NewRequest(self.key_url("/"), "GET", nil, form)
		err = id.SignRequestV1(hreq, aws.CanonicalizeS3, 15)

		if err == nil {
			resp, err = self.conn.Request(hreq)
		}
		if err == nil {
			err = aws.CodeToError(resp.StatusCode)
			if err == nil {
				err = xml.Unmarshal(resp.Body, &result)
				if err == nil {
					for i := range result.Contents {
						out <- result.Contents[i].Key
					}
					if len(result.Contents) > 0 {
						last = result.Contents[len(result.Contents)-1].Key
					}
					done = !result.IsTruncated
				}
			}
			resp.Body.Close()
		}
	}
	close(out)
	return
}

// Opens the named key and copys it to the named io.Writer IFF the response.Status is 200.
// Also returns the http headers for convenience (regardless of status code, as long as a  resp is generated).
func (self *Bucket) GetKey(id *aws.Signer, key string, w io.Writer) (hdr http.Header, err os.Error) {
	var resp *http.Response
	hreq := aws.NewRequest(self.key_url(key), "GET", nil, nil)
	err = id.SignRequestV1(hreq, aws.CanonicalizeS3, 15)
	if err == nil {
		resp, err = self.conn.Request(hreq)
	}
	if err == nil {
		defer resp.Body.Close()
		err = aws.CodeToError(resp.StatusCode)
		hdr = resp.Header
		if err == nil {
			_, err2 := io.Copy(w, resp.Body)
			if err == nil {
				err = err2
			}
		}
	}
	return
}

func (self *Service) DescribeLoadBalancers(id *aws.Signer) (lbs []LoadBalancerDescription, err os.Error) {
	parms := http.Values{}
	parms.Set("Action", "DescribeLoadBalancers")
	req := aws.NewRequest(self.URL, "GET", nil, parms)
	err = id.SignRequestV2(req, aws.Canonicalize, DEFAULT_VERSION, 0)
	if err != nil {
		return
	}
	resp, err := self.conn.Request(req)
	if err == nil {
		qr := LoadBalancerQueryResult{}
		defer resp.Body.Close()
		err = xml.Unmarshal(resp.Body, &qr)
		if err == nil {
			lbs = qr.LoadBalancerDescription
		}
	}

	return
}

// Will put an open file descriptor to the named key.  Size is determined
// by statting the fd (so a partially read file will not work).
// TODO: ACL's & content-type/headers support
func (self *Bucket) PutFile(id *aws.Signer, key string, fp *os.File) (err os.Error) {
	var resp *http.Response
	if fp == nil {
		return os.NewError("invalid file descriptor")
	}
	fi, err := fp.Stat()
	if err == nil {
		fsize := fi.Size
		hdr := http.Header{}
		hreq := aws.NewRequest(self.key_url(key), "PUT", hdr, nil)
		hreq.ContentLength = fsize
		hreq.Body = fp
		err = id.SignRequestV1(hreq, aws.CanonicalizeS3, 15)
		if err == nil {
			resp, err = self.conn.Request(hreq)
			if err == nil {
				defer resp.Body.Close()
				err = aws.CodeToError(resp.StatusCode)
			}
		}
	}
	return
}

func (self *Domain) DeleteAttribute(s *aws.Signer, item string, attrs, expected AttributeList) (err os.Error) {
	var resp *http.Response

	vl := attrs.Values(ATTRIBUTE_LIST)

	for k, v := range expected.Values(EXPECTED_LIST) {
		vl[k] = v
	}

	vl.Set("Action", "DeleteAttribute")
	vl.Set("DomainName", self.Name)
	vl.Set("ItemName", item)

	req := aws.NewRequest(self.URL, "GET", nil, vl)
	err = s.SignRequestV2(req, aws.Canonicalize, DEFAULT_API_VERSION, 0)
	if err == nil {
		resp, err = self.conn.Request(req)
	}
	if err == nil {
		defer resp.Body.Close()
		err = aws.CodeToError(resp.StatusCode)
	}
	return
}

func (self *Service) CreateLoadBalancer(id *aws.Signer, name string, zones []string, listeners []Listener) (err os.Error) {
	parms := http.Values{}
	parms.Set("Action", "CreateLoadBalancer")
	parms.Set("LoadBalancerName", name)
	for zi := range zones {
		parms.Set(Sprintf("AvailabilityZones.members.%d", zi+1), zones[zi])
	}
	for li := range listeners {
		listeners[li].SetValues(parms, li+1)
	}
	req := aws.NewRequest(self.URL, "GET", nil, parms)
	err = id.SignRequestV2(req, aws.Canonicalize, DEFAULT_VERSION, 0)
	if err != nil {
		return
	}
	resp, err := self.conn.Request(req)
	if err == nil {
		defer resp.Body.Close()
		ob, _ := http.DumpResponse(resp, true)
		os.Stdout.Write(ob)
	}
	return

}