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95 lines
2.7 KiB
95 lines
2.7 KiB
// Copyright 2017-2018 DERO Project. All rights reserved.
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// Use of this source code in any form is governed by RESEARCH license.
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// license can be found in the LICENSE file.
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// GPG: 0F39 E425 8C65 3947 702A 8234 08B2 0360 A03A 9DE8
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//
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package rpcserver
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import "strconv"
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import "net/http"
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import "compress/gzip"
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//import "github.com/pierrec/lz4"
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// serve the outputs in streaming mode
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// feeds any outputs requested by the server
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func getoutputs(rw http.ResponseWriter, req *http.Request) {
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var err error
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start := uint64(0)
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stop := uint64(0)
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{ // parse start query parameter
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keys, ok := req.URL.Query()["start"]
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if !ok || len(keys) < 1 {
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//log.Println("Url Param 'key' is missing")
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//return
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} else {
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start_string := keys[0]
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start, err = strconv.ParseUint(start_string, 10, 64)
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if err != nil {
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start = 0
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}
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}
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}
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{ // parse stop query parameter
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keys, ok := req.URL.Query()["stop"]
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if !ok || len(keys) < 1 {
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} else {
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stop_string := keys[0]
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stop, err = strconv.ParseUint(stop_string, 10, 64)
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if err != nil {
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stop = 0
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}
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}
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}
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// do sanity check of stop first
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top_id := chain.Get_Top_ID()
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biggest_output_index := chain.Block_Count_Vout(top_id) + chain.Get_Block_Output_Index(top_id)
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if stop == 0 || stop > biggest_output_index {
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stop = biggest_output_index
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}
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// feed in atleast 1 index
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if start >= stop {
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start = stop - 1
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}
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/* lz4writer := lz4.NewWriter(rw)
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lz4writer.HighCompression = true // enable extreme but slow compression
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lz4writer.BlockMaxSize = 256*1024 // small block size to decrease memory consumption
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*/
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gzipwriter := gzip.NewWriter(rw)
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defer gzipwriter.Close()
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for i := start; i <= stop; i++ {
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// load the bytes and send them
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data, err := chain.Read_output_index(i)
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if err != nil {
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logger.Warnf("err while reading output err: %s\n", err)
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break
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}
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//
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//rw.Write(data)
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// lz4writer.Write(data)
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gzipwriter.Write(data)
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}
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//lz4writer.Flush() // flush any pending data
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}
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