如何构造Elasticsearch分页Payload以通过Curl批量提取Bubble.io插件页面数据？

Absolutely! This is totally feasible—you just need to replicate the exact API requests that the bubble.io plugins page makes to its Elasticsearch backend, including the pagination payload parameters. Here's a step-by-step breakdown to pull this off:

Step 1: Capture full request details with browser dev tools #

First, you need to get all the specifics of the API call the page makes:

• Open the bubble.io/plugins page in Chrome/Firefox.
• Launch DevTools (F12), switch to the Network tab.
• Refresh the page, then look for requests to an Elasticsearch endpoint (usually something like /search or with "elasticsearch" in the URL).
• Click on that request to view:
  • The Request URL (the actual Elasticsearch endpoint bubble is hitting).
  • Headers: Pay close attention to Authorization, Content-Type, Referer, and any custom headers—you’ll need these in your curl command to avoid being blocked.
  • Payload: The JSON body the page sends. Your x, y, z parameters are likely Elasticsearch pagination tools like from (starting index), size (results per page), or search_after (cursor-based pagination to avoid duplicates).

Step 2: Test a single curl request #

Once you have all the details, test a single curl command to confirm it works. For example, if the payload uses from and size:

curl -X POST "https://your-captured-elasticsearch-endpoint.com/search" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer your-token-here" \
  -H "Referer: https://bubble.io/plugins" \
  -d '{
    "query": { /* copy bubble''s exact query here */ },
    "from": 0,
    "size": 20,
    "sort": [{"plugin_name": "asc"}] /* match the sort from the original payload */
  }'

Replace placeholders with values you captured. If this returns valid JSON results, you’re ready to scale.

Step 3: Build a Bash script for pagination #

Wrap the curl command in a loop to fetch all pages. The approach depends on the pagination type:

Case 1: Offset-based pagination (using from and size) #

If the payload uses from to increment the starting index, loop until the response returns fewer results than size:

#!/bin/bash

# Configuration
ENDPOINT="https://your-captured-endpoint.com/search"
HEADERS=(
  "Content-Type: application/json"
  "Authorization: Bearer your-token"
  "Referer: https://bubble.io/plugins"
)
PAGE_SIZE=20
FROM=0
OUTPUT_FILE="bubble_plugins.json"

# Initialize output file
echo "[" > "$OUTPUT_FILE"

while true; do
  echo "Fetching page starting at index $FROM..."
  
  # Send curl request and capture response
  RESPONSE=$(curl -s -X POST "$ENDPOINT" \
    "${HEADERS[@]/#/-H }" \
    -d '{
      "query": { /* paste bubble''s query here */ },
      "from": '"$FROM"',
      "size": '"$PAGE_SIZE"'
    }')
  
  # Get number of results returned
  RESULTS_COUNT=$(echo "$RESPONSE" | jq '.hits.total.value')
  
  if [ "$RESULTS_COUNT" -eq 0 ]; then
    echo "No more results. Exiting loop."
    break
  fi
  
  # Append results to output file (clean up formatting)
  echo "$RESPONSE" | jq '.hits.hits' | sed '1d;$d' >> "$OUTPUT_FILE"
  echo "," >> "$OUTPUT_FILE"
  
  # Increment starting index
  FROM=$((FROM + PAGE_SIZE))
  
  # Add delay to avoid rate limiting
  sleep 2
done

# Clean up output file (remove trailing comma and close array)
sed -i '$ s/,$//' "$OUTPUT_FILE"
echo "]" >> "$OUTPUT_FILE"

echo "All data saved to $OUTPUT_FILE"

Case 2: Cursor-based pagination (using search_after) #

If the payload uses search_after (common for large datasets), extract the last document’s sort values from each response to use in the next request:

#!/bin/bash

ENDPOINT="https://your-captured-endpoint.com/search"
HEADERS=(...)
PAGE_SIZE=20
SEARCH_AFTER=""
OUTPUT_FILE="bubble_plugins.json"

echo "[" > "$OUTPUT_FILE"

while true; do
  PAYLOAD='{
    "query": { /* paste bubble''s query here */ },
    "size": '"$PAGE_SIZE"',
    "sort": [{"plugin_name": "asc"}]
  }'
  
  # Add search_after to payload if it exists
  if [ -n "$SEARCH_AFTER" ]; then
    PAYLOAD=$(echo "$PAYLOAD" | jq --argjson sa "$SEARCH_AFTER" '. + {"search_after": $sa}')
  fi
  
  RESPONSE=$(curl -s -X POST "$ENDPOINT" "${HEADERS[@]/#/-H }" -d "$PAYLOAD")
  
  RESULTS=$(echo "$RESPONSE" | jq '.hits.hits')
  RESULTS_COUNT=$(echo "$RESULTS" | jq 'length')
  
  if [ "$RESULTS_COUNT" -eq 0 ]; then
    break
  fi
  
  # Append results to output
  echo "$RESULTS" | sed '1d;$d' >> "$OUTPUT_FILE"
  echo "," >> "$OUTPUT_FILE"
  
  # Get last document's sort values for next request
  SEARCH_AFTER=$(echo "$RESPONSE" | jq '.hits.hits[-1].sort')
  
  sleep 2
done

# Clean up output file
sed -i '$ s/,$//' "$OUTPUT_FILE"
echo "]" >> "$OUTPUT_FILE"

Important Notes #

• Rate Limiting: Bubble might block your requests if you hit their API too quickly. Add a sleep between requests (2-5 seconds) to avoid this.
• API Changes: Bubble could modify their payload or endpoint at any time. If your script breaks, re-inspect the request in dev tools to update parameters.
• Authentication: If the API uses an auth token, ensure it’s included in headers. Some tokens expire, so you might need to refresh them periodically.
• jq Dependency: The scripts use jq to parse JSON. Install it with sudo apt install jq (Debian/Ubuntu) or brew install jq (macOS).

内容的提问来源于stack exchange，提问作者Santosh