diogo/spark-art-dashboard
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Limit the log size so that dashboard charts are not overloaded

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Added configuration constants
This script is designed to be ran by Dash (which is faster than Bash)
This commit is contained in:
Diogo Cordeiro 2018-10-03 03:10:49 +01:00
parent 1310b92a33
commit 838cc1d950
2 changed files with 21 additions and 13 deletions
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1
index.html
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@ -46,7 +46,6 @@
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.2/Chart.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/chartjs-plugin-annotation/0.5.7/chartjs-plugin-annotation.min.js"></script>
<script src="chart.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.1.1/socket.io.slim.js"></script>
<script src="ingestion-rate.js"></script>
<footer id="footer">
<p><a href="https://github.com/diogogithub/spark-art-dashboard">ART Dashboard</a> and <a href="https://github.com/diogogithub/excalibur_template/">Excalibur template</a> by <a href="https://www.diogo.site/">Diogo Cordeiro</a> - <a href="https://www.inesc-id.pt/">INESC-ID</a>

33
log-provider.sh
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@ -1,17 +1,26 @@
#!/bin/bash
#!/bin/sh
# last stats file to read from
# CSV file name
FILENAME=$(ls stats-* | tail -n 1)
# number of lines to read
# chunk file name
CHUNK_FILENAME="current-log-provider-chunk.csv"
# number of log lines for chunk
N=100
# chunk filename
CHUNK_FILENAME="log-provider-chunk.csv"
header=$(head -n 1 $FILENAME)
# server port
PORT=4870
# CSV header
header=$(head -n 1 "$FILENAME")
while true; do
paste <(echo $header) <(tail -n +2 $FILENAME | tail -n $N) --d '' > $CHUNK_FILENAME
{ echo -ne "HTTP/1.0 200 OK\r\nContent-Length: $(wc -c $CHUNK_FILENAME)\r\nAccess-Control-Allow-Origin: *\r\n\r"; cat $CHUNK_FILENAME; } | nc -v -l -p 4870
# We don't want repeated headers
if [ $(wc -l < "$FILENAME") -gt "$N" ]; then
{ echo "$header"; tail -n "$N" $FILENAME; } > "$CHUNK_FILENAME"
else
cp -f -- "$FILENAME" "$CHUNK_FILENAME"
fi
{ echo -ne "HTTP/1.0 200 OK\r\nContent-Length: $(wc -c <"current-log-provider-chunk.csv")\r\nAccess-Control-Allow-Origin: *\r\n\r"; cat "current-log-provider-chunk.csv"; } | nc -v -l -p "$PORT"
done