Managing Google Drive API

Google Drive API Management Skill

Manage and analyze Google Drive resources including files, permissions, shared drives, and storage.

API Conventions

Authentication

All API calls use Bearer OAuth 2.0 token, injected automatically.

Base URL

https://www.googleapis.com/drive/v3

Core Helper Function

#!/bin/bash

gdrive_api() {
    local method="$1"
    local endpoint="$2"
    local data="${3:-}"

    if [ -n "$data" ]; then
        curl -s -X "$method" \
            -H "Authorization: Bearer $GOOGLE_ACCESS_TOKEN" \
            -H "Content-Type: application/json" \
            "https://www.googleapis.com/drive/v3${endpoint}" \
            -d "$data"
    else
        curl -s -X "$method" \
            -H "Authorization: Bearer $GOOGLE_ACCESS_TOKEN" \
            "https://www.googleapis.com/drive/v3${endpoint}"
    fi
}

Output Rules

• Target ≤50 lines per script output
• Use jq to extract only needed fields
• Never dump full API responses

Phase 1: Discovery

#!/bin/bash
echo "=== About (User & Storage) ==="
gdrive_api GET "/about?fields=user,storageQuota" \
    | jq '{
        user: .user.emailAddress,
        storage_used_gb: (.storageQuota.usage | tonumber / 1073741824 | . * 10 | floor / 10),
        storage_limit_gb: (.storageQuota.limit | tonumber / 1073741824 | . * 10 | floor / 10),
        drive_usage_gb: (.storageQuota.usageInDrive | tonumber / 1073741824 | . * 10 | floor / 10),
        trash_usage_gb: (.storageQuota.usageInDriveTrash | tonumber / 1073741824 | . * 10 | floor / 10)
    }'

echo ""
echo "=== Recent Files ==="
gdrive_api GET "/files?pageSize=20&orderBy=modifiedTime%20desc&fields=files(id,name,mimeType,size,modifiedTime,owners)" \
    | jq -r '.files[] | "\(.name[0:30])\t\(.mimeType | split("/") | last | .[0:15])\t\(.size // "-")\t\(.modifiedTime[0:10])"' \
    | column -t | head -20

echo ""
echo "=== Shared Drives ==="
gdrive_api GET "/drives?pageSize=20&fields=drives(id,name,createdTime)" \
    | jq -r '.drives[] | "\(.id)\t\(.name[0:30])\t\(.createdTime[0:10])"' | head -15

Phase 2: Analysis

Storage & File Analysis

#!/bin/bash
echo "=== Largest Files ==="
gdrive_api GET "/files?pageSize=20&orderBy=quotaBytesUsed%20desc&fields=files(name,size,mimeType,modifiedTime)&q=trashed=false" \
    | jq -r '.files[] | "\(.size // 0 | tonumber / 1048576 | . * 10 | floor / 10) MB\t\(.name[0:30])\t\(.mimeType | split("/") | last | .[0:15])\t\(.modifiedTime[0:10])"' \
    | head -15

echo ""
echo "=== Files in Trash ==="
gdrive_api GET "/files?pageSize=20&q=trashed=true&fields=files(name,size,trashedTime)&orderBy=quotaBytesUsed%20desc" \
    | jq -r '.files[] | "\(.size // 0 | tonumber / 1048576 | . * 10 | floor / 10) MB\t\(.name[0:30])\t\(.trashedTime[0:10] // "")"' \
    | head -10

echo ""
echo "=== Files by Type ==="
gdrive_api GET "/files?pageSize=100&fields=files(mimeType)&q=trashed=false" \
    | jq -r '.files[] | .mimeType' | sort | uniq -c | sort -rn | head -10

Sharing & Permission Health

#!/bin/bash
echo "=== Externally Shared Files ==="
gdrive_api GET "/files?pageSize=20&fields=files(name,shared,sharingUser,permissions)&q=sharedWithMe=true" \
    | jq -r '.files[] | "\(.name[0:30])\t\(.sharingUser.emailAddress // "?")"' | head -15

echo ""
echo "=== Files Shared with Anyone (link sharing) ==="
gdrive_api GET "/files?pageSize=20&fields=files(name,permissions)&q=visibility='anyoneWithLink'" \
    | jq -r '.files[] | "\(.name[0:30])\t\(.permissions | map(select(.type=="anyone")) | length) public perms"' | head -10

echo ""
echo "=== Recent Activity ==="
gdrive_api GET "/changes/startPageToken" | jq '.startPageToken'
gdrive_api GET "/activity/v2/activity?consolidationStrategy.legacy.period=day&pageSize=10" 2>/dev/null \
    || echo "Activity API requires separate enablement"

Output Format

=== Google Drive: <email> ===
Storage: <used>GB / <limit>GB (Trash: <trash>GB)

--- Files ---
Total (page): <n>  Largest: <name> (<size>MB)

--- Sharing ---
Shared Drives: <n>
Public Links: <n>

--- By Type ---
document: <n>  spreadsheet: <n>  pdf: <n>

Anti-Hallucination Rules

1. NEVER assume resource names — always discover via CLI/API in Phase 1 before referencing in Phase 2.
2. NEVER fabricate metric names or dimensions — verify against the service documentation or --help output.
3. NEVER mix CLI commands between service versions — confirm which version/API you are targeting.
4. ALWAYS use the discovery → verify → analyze chain — every resource referenced must have been discovered first.
5. ALWAYS handle empty results gracefully — an empty response is valid data, not an error to retry.

Counter-Rationalizations

Common Pitfalls

• Fields parameter: Always specify fields to limit response size and avoid quota waste
• Query syntax: Use q parameter with Drive query syntax (e.g., trashed=false, mimeType='application/pdf')
• Pagination: Use pageToken from response nextPageToken; default page size is 100
• Rate limits: 12,000 queries/minute per project; 12 queries/second per user
• MIME types: Google Docs use application/vnd.google-apps.* MIME types