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feat: add POLLING_LIMIT_PER_HOST to limit concurrent requests per host

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Each batch of feeds sent to the worker pool is now guaranteed to contain unique feed URLs.

When `POLLING_LIMIT_PER_HOST` is set, an additional limit is applied to the number of concurrent requests per hostname, helping to prevent overloading a single server.

Note: Additional requests may still be made during feed refresh. For example, to fetch feed icons or when the web scraper is enabled for a particular feed.
This commit is contained in:
Frédéric Guillot 2025-08-08 12:19:01 -07:00
parent a4f672b589
commit 34499b887b
13 changed files with 146 additions and 34 deletions
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10
internal/config/parser.go
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@ -137,12 +137,16 @@ func (p *parser) parseLines(lines []string) (err error) {
p.opts.cleanupRemoveSessionsDays = parseInt(value, defaultCleanupRemoveSessionsDays)
case "WORKER_POOL_SIZE":
p.opts.workerPoolSize = parseInt(value, defaultWorkerPoolSize)
case "POLLING_FREQUENCY":
p.opts.pollingFrequency = parseInt(value, defaultPollingFrequency)
case "FORCE_REFRESH_INTERVAL":
p.opts.forceRefreshInterval = parseInt(value, defaultForceRefreshInterval)
case "BATCH_SIZE":
p.opts.batchSize = parseInt(value, defaultBatchSize)
case "POLLING_FREQUENCY":
p.opts.pollingFrequency = parseInt(value, defaultPollingFrequency)
case "POLLING_LIMIT_PER_HOST":
p.opts.pollingLimitPerHost = parseInt(value, 0)
case "POLLING_PARSING_ERROR_LIMIT":
p.opts.pollingParsingErrorLimit = parseInt(value, defaultPollingParsingErrorLimit)
case "POLLING_SCHEDULER":
p.opts.pollingScheduler = strings.ToLower(parseString(value, defaultPollingScheduler))
case "SCHEDULER_ENTRY_FREQUENCY_MAX_INTERVAL":
@ -155,8 +159,6 @@ func (p *parser) parseLines(lines []string) (err error) {
p.opts.schedulerRoundRobinMinInterval = parseInt(value, defaultSchedulerRoundRobinMinInterval)
case "SCHEDULER_ROUND_ROBIN_MAX_INTERVAL":
p.opts.schedulerRoundRobinMaxInterval = parseInt(value, defaultSchedulerRoundRobinMaxInterval)
case "POLLING_PARSING_ERROR_LIMIT":
p.opts.pollingParsingErrorLimit = parseInt(value, defaultPollingParsingErrorLimit)
case "MEDIA_PROXY_HTTP_CLIENT_TIMEOUT":
p.opts.mediaProxyHTTPClientTimeout = parseInt(value, defaultMediaProxyHTTPClientTimeout)
case "MEDIA_PROXY_MODE":